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Fuel log graph
Efficiency log for: RSX2fast4mpg - 2002 Acura RSX Type S
  • Lifetime Fuel Economy: 38.3 mpg (US), 6.1 L/100 km, 46 mpg (Imp)
  • 90-day Fuel Economy: 38.2 mpg (US), 6.2 L/100 km, 45.9 mpg (Imp)
  • 3-tank Fuel Economy: 38.9 mpg (US), 6 L/100 km, 46.7 mpg (Imp)
  • EPA Combined Rating / % over rating: 24 mpg (US) / 59.3% (based on 90-day fuel economy)
  • Total fills: 76
  • Average cost per gal/L: $3.58 per gal (US); $0.00 per L (price data entered for 75 fill/s)
  • Average cost per fill: $40.44
  • Average distance cost: $0.09 per mi. / $0.06 per km
  • Total fuel used: 858.31 gal (US), 3249.1 L
  • Total distance traveled: 32848.8 mi. / 52865 km
  • Total cost: $3,032.91
  • Total fuel saved vs. EPA: 510.4 gal. (US) / 1932.1 L
  • Total saved: $1827.23 (based on avg. cost per gal./L)
  • Average tank distance: 432.2 mi. / 695.6 km
Fill date Distance Fill amount Price Fuel Economy Details
2012-09-27 471.7 mi
759.13 km
12.5 gal (US)
10.41 gal (Imp)
47.32 L
421.25 kWh
$3.869
($48.36 total for this fill)
37.74 mpg (US)
45.31 mpg (Imp)
6.23 L/100 km
2.65 gal (US)/100 mi
893.05 Wh/mi
I've missed several tanks without entering.
2012-08-25 459.7 mi
739.82 km
11.952 gal (US)
9.95 gal (Imp)
45.24 L
402.78 kWh
$3.889
($46.48 total for this fill)
38.46 mpg (US)
46.2 mpg (Imp)
6.12 L/100 km
2.6 gal (US)/100 mi
876.18 Wh/mi
Continued FI issues. Some highway driving, although not as much as the last two tanks.
2012-08-19 480.6 mi
773.45 km
11.866 gal (US)
9.88 gal (Imp)
44.92 L
399.88 kWh
$3.699
($43.89 total for this fill)
40.5 mpg (US)
48.64 mpg (Imp)
5.81 L/100 km
2.47 gal (US)/100 mi
832.04 Wh/mi
Still having major fuel injection issues, getting worse, but the improved mileage reflects a 200+ mile road trip with a focus on hypermiling using lots of eoc time, low speeds and attention to detail.
2012-08-13 464.8 mi
748.02 km
11.625 gal (US)
9.68 gal (Imp)
44.01 L
391.76 kWh
$3.619
($42.07 total for this fill)
39.98 mpg (US)
48.02 mpg (Imp)
5.88 L/100 km
2.5 gal (US)/100 mi
842.86 Wh/mi
Car spent six days in the shop to deal with a low end miss. Replaced air-fuel sensor, didn't fix the problem at all. Did a 200+ mile road trip one day that boosted the average quite a bit, but tank should have exceeded 40mpg easily.
2012-08-03 441.3 mi
710.2 km
12.462 gal (US)
10.38 gal (Imp)
47.17 L
419.97 kWh
$3.549
($44.23 total for this fill)
35.41 mpg (US)
42.51 mpg (Imp)
6.64 L/100 km
2.82 gal (US)/100 mi
951.67 Wh/mi
It really seems like an overfill or a bad pump because I still showed a fair amount of gas on the gauge and the idiot light only just came on (comes on at 2.4 gallons). I filled up at Costco, which I hardly ever do, so I don't know how accurate their pumps are, but given that the tank is only 13 gallons, I really have a hard time believing this was an accurate read. Also, no reason to believe that this tank would have exceptionally poor mpg, but it's way off my average for this time of year.

Regardless, next tank won't answer the issue very well since the car is in the shop getting some work done on the fuel injection. They're liable to burn up a good volume of fuel just diagnosing.
2012-07-26 419.2 mi
674.64 km
11.119 gal (US)
9.26 gal (Imp)
42.09 L
374.71 kWh
$3.629
($40.35 total for this fill)
37.7 mpg (US)
45.27 mpg (Imp)
6.24 L/100 km
2.65 gal (US)/100 mi
893.87 Wh/mi
Major fuel injector problems continue. Must make an appointment to get the car in for service.
2012-07-18 455.2 mi
732.57 km
11.9 gal (US)
9.91 gal (Imp)
45.05 L
401.03 kWh
$3.779
($44.97 total for this fill)
38.25 mpg (US)
45.93 mpg (Imp)
6.15 L/100 km
2.61 gal (US)/100 mi
881 Wh/mi
Solid tank, some air conditioned commutes, a little extra highway driving.
2012-07-06 427.6 mi
688.16 km
11.3 gal (US)
9.41 gal (Imp)
42.78 L
380.81 kWh
$3.849
($43.49 total for this fill)
37.84 mpg (US)
45.44 mpg (Imp)
6.22 L/100 km
2.64 gal (US)/100 mi
890.58 Wh/mi
Some hot days that required air conditioning, some wet and rainy days.
2012-06-26 418.3 mi
673.19 km
11.8 gal (US)
9.83 gal (Imp)
44.67 L
397.66 kWh
$3.959
($46.72 total for this fill)
35.45 mpg (US)
42.55 mpg (Imp)
6.64 L/100 km
2.82 gal (US)/100 mi
950.66 Wh/mi
Started off to look like a short fill, but then compounded even more with a three hour traffic jam. Stuck for over an hour on the Eisenhower Tunnel approach (7% grade) where I couldn't shut off my car the entire time due to creep and tall vehicles all around to avoid seeing far enough ahead. Miserable day in the car and really bad for mpg, too.

<likely a short fill>
2012-06-20 472.2 mi
759.93 km
10.86 gal (US)
9.04 gal (Imp)
41.11 L
365.98 kWh
$3.999
($43.43 total for this fill)
43.48 mpg (US)
52.23 mpg (Imp)
5.41 L/100 km
2.3 gal (US)/100 mi
775.05 Wh/mi
Some commuting, but the big difference was a trip out to Leadville and back. Some great EOC'ing in both directions, some for 5-plus minutes. Between that and finally having the tire pressure where it should be, it was a record tank.
2012-06-13 400.6 mi
644.7 km
10.84 gal (US)
9.03 gal (Imp)
41.03 L
365.31 kWh
$4.029
($43.67 total for this fill)
36.96 mpg (US)
44.36 mpg (Imp)
6.36 L/100 km
2.71 gal (US)/100 mi
911.91 Wh/mi
2012-06-05 442.5 mi
712.13 km
11.099 gal (US)
9.24 gal (Imp)
42.01 L
374.04 kWh
$3.949
($43.83 total for this fill)
39.87 mpg (US)
47.89 mpg (Imp)
5.9 L/100 km
2.51 gal (US)/100 mi
845.29 Wh/mi
I'm not sure I've solved my MPG problem, but then again, maybe. I discovered that at my last oil change the shop had dropped my tire pressure to 32psi hot, which was about 28psi cold. I bumped it up to just shy of the sidewall max of 51 and while the handling has definitely taken a back seat, this tank is definitely a significant improvement over the last few tanks. Finger's crossed that this is the start of some good high mileage summer tanks.

The low end miss is still there.
2012-05-29 410.4 mi
660.47 km
11.413 gal (US)
9.5 gal (Imp)
43.2 L
384.62 kWh
$3.999
($45.64 total for this fill)
35.96 mpg (US)
43.2 mpg (Imp)
6.54 L/100 km
2.78 gal (US)/100 mi
937.18 Wh/mi
Not sure what's wrong, exploring a number of things. Definitely a fuel injector problem at low RPMs that I can't seem to resolve with cans of stuff.
2012-05-19 417.8 mi
672.38 km
11.6 gal (US)
9.66 gal (Imp)
43.91 L
390.92 kWh
$3.911
($45.37 total for this fill)
36.02 mpg (US)
43.25 mpg (Imp)
6.53 L/100 km
2.78 gal (US)/100 mi
935.66 Wh/mi
Not sure why this tank was so bad. Continuing to have a low RPM miss below 2200 rpm.
2012-05-10 418.4 mi
673.35 km
11.04 gal (US)
9.19 gal (Imp)
41.79 L
372.05 kWh
$4.089
($45.14 total for this fill)
37.9 mpg (US)
45.53 mpg (Imp)
6.21 L/100 km
2.64 gal (US)/100 mi
889.22 Wh/mi
Good weather, still some low RPM miss issues despite BG44k. Filled up at Shell
2012-05-02 433.7 mi
697.97 km
11.173 gal (US)
9.3 gal (Imp)
42.29 L
376.53 kWh
$3.939
($44.01 total for this fill)
38.82 mpg (US)
46.63 mpg (Imp)
6.06 L/100 km
2.58 gal (US)/100 mi
868.18 Wh/mi
Still some fuel injector issues, missing at low RPMs. Still, good weather, some better technique, summer tires and leaving for work earlier to beat rush hour helped put me back over 38mpg. Added a can of BG44k with this fill up. Fingers crossed that finally resolves the issue once and for all.
2012-04-24 431.4 mi
694.27 km
11.38 gal (US)
9.48 gal (Imp)
43.08 L
383.51 kWh
$3.949
($44.94 total for this fill)
37.91 mpg (US)
45.51 mpg (Imp)
6.21 L/100 km
2.64 gal (US)/100 mi
888.99 Wh/mi
Good weather, mostly good commutes, not the best focus on hypermiling. Despite the BG44k, the fuel injectors still seem dirty as I'm getting a low end miss still. Also, late in the tank I removed my snow tires and put on my summer tires.
2012-04-15 414.2 mi
666.59 km
11.19 gal (US)
9.32 gal (Imp)
42.36 L
377.1 kWh
$4.199
($46.99 total for this fill)
37.02 mpg (US)
44.44 mpg (Imp)
6.35 L/100 km
2.7 gal (US)/100 mi
910.43 Wh/mi
Car was running like crap with a low speed miss when accelerating or going up hill below 2200rpm. Added a can of BG44k with the next tank, but the damage was done. Dirty fuel injectors damaged what should have been the best mileage of the year so far (good highway driving, good weather and light commutes).
2012-04-07 397.6 mi
639.88 km
11.06 gal (US)
9.21 gal (Imp)
41.87 L
372.72 kWh
$3.979
($44.01 total for this fill)
35.95 mpg (US)
43.17 mpg (Imp)
6.54 L/100 km
2.78 gal (US)/100 mi
937.42 Wh/mi
Last fill was definitely short, as gauge dropped off full within 45-50 miles (generally still pegging the needle until close to 100 miles). Some good highway miles, one or two bad commutes.
2012-03-31 403.4 mi
649.21 km
10.918 gal (US)
9.09 gal (Imp)
41.33 L
367.94 kWh
$4.099
($44.75 total for this fill)
36.95 mpg (US)
44.38 mpg (Imp)
6.37 L/100 km
2.71 gal (US)/100 mi
912.1 Wh/mi
Warmer temps, fair traffic on all but one day. Car in for service for three days (new strut, new axle seal on tranny, valve adjustment, power steering fluid change).
2012-03-19 460.4 mi
740.94 km
11.6 gal (US)
9.66 gal (Imp)
43.91 L
390.92 kWh
$3.899
($45.23 total for this fill)
39.69 mpg (US)
47.66 mpg (Imp)
5.93 L/100 km
2.52 gal (US)/100 mi
849.09 Wh/mi
Solid tank, warmer weather, reasonable traffic.
2012-03-11 418.5 mi
673.51 km
11.98 gal (US)
9.98 gal (Imp)
45.35 L
403.73 kWh
$3.759
($45.03 total for this fill)
34.93 mpg (US)
41.93 mpg (Imp)
6.73 L/100 km
2.86 gal (US)/100 mi
964.71 Wh/mi
Low tank, not sure why. Should have been plenty of warm days and long cruises to keep it up in the high 30s.
2012-03-01 444.1 mi
714.71 km
11.5 gal (US)
9.58 gal (Imp)
43.53 L
387.55 kWh
$3.239
($37.25 total for this fill)
38.62 mpg (US)
46.36 mpg (Imp)
6.09 L/100 km
2.59 gal (US)/100 mi
872.66 Wh/mi
more mild temperatures probably went a long way toward helping my mpg this tank over last.
2012-02-21 432.7 mi
696.36 km
12.08 gal (US)
10.06 gal (Imp)
45.73 L
407.1 kWh
$3.359
($40.58 total for this fill)
35.82 mpg (US)
43.01 mpg (Imp)
6.57 L/100 km
2.79 gal (US)/100 mi
940.84 Wh/mi
2012-02-10 441.6 mi
710.69 km
12.1 gal (US)
10.07 gal (Imp)
45.8 L
407.77 kWh
$3.299
($39.92 total for this fill)
36.5 mpg (US)
43.85 mpg (Imp)
6.44 L/100 km
2.74 gal (US)/100 mi
923.39 Wh/mi
Tank got off to a good start but winter weather and winter driving conditions definitely had an impact late in the tank.
2012-01-30 314.7 mi
506.46 km
7.9 gal (US)
6.58 gal (Imp)
29.9 L
266.23 kWh
$3.299
($26.06 total for this fill)
39.84 mpg (US)
47.83 mpg (Imp)
5.9 L/100 km
2.51 gal (US)/100 mi
845.98 Wh/mi
Solid tank, both fill and refill at the same station (Shell) on the same pump so the accuracy should be dead on. Not a whole lotta rush hour commutes as I was convalescing at home and not working most of the last two weeks. When I was driving, it wasn't at rush hour, wasn't during snow storms, and I was destination oriented.
2012-01-18 403.5 mi
649.37 km
11.609 gal (US)
9.67 gal (Imp)
43.94 L
391.22 kWh
$3.219
($37.37 total for this fill)
34.76 mpg (US)
41.73 mpg (Imp)
6.77 L/100 km
2.88 gal (US)/100 mi
969.57 Wh/mi
Absolute crap tank. Some downright terrible commutes stuck in snow storms. One commute took 95 minutes to cover the distance that generally takes me 40-45 minutes. Very cold temperatures, snowy and icy roads, and mpg to match.

edit: in hindsight, I suspect this was a short fill at the beginning of the tank as the car was not on level ground and pointing uphill at an angle. Additionally, the refill was at the Shell station where the car points ever-so-slightly downhill and the pump tends to shut off only when very full.
2011-12-31 496.3 mi
798.72 km
12.838 gal (US)
10.69 gal (Imp)
48.6 L
432.64 kWh
$3.159
($40.56 total for this fill)
38.66 mpg (US)
46.43 mpg (Imp)
6.08 L/100 km
2.59 gal (US)/100 mi
871.73 Wh/mi
Epic fail. I ran out of gas in my bank parking lot and had to walk to the nearest gas station to buy a gas can and walk back to my car. I knew better. I knew that to go over 500 miles I needed to average over 39mpg and this was winter driving where my car just isn't capable of that. I had the chance to stop before going to the bank but didn't. Stupid move and it was a miserable, cold, windy day to remind me of my poor judgement.

I used a can of BG44k at the prior fill and that certainly helped both mpg and performance. Much better low end performance when all the fuel injectors are clean! Otherwise, pretty typical winter tank with lousy roads, but light holiday traffic commutes.
2011-12-20 443.6 mi
713.9 km
11.782 gal (US)
9.81 gal (Imp)
44.6 L
397.05 kWh
$3.159
($37.22 total for this fill)
37.65 mpg (US)
45.22 mpg (Imp)
6.25 L/100 km
2.66 gal (US)/100 mi
895.06 Wh/mi
Lots of cold weather, lots of snow, icy roads, gridlocked traffic, etc. Tack on snow tires on all four wheels and my winter driving survival kit in the trunk and it's surprising it's not worse.
2011-12-08 409.1 mi
658.38 km
11.253 gal (US)
9.37 gal (Imp)
42.6 L
379.23 kWh
$3.509
($39.49 total for this fill)
36.35 mpg (US)
43.66 mpg (Imp)
6.47 L/100 km
2.75 gal (US)/100 mi
926.99 Wh/mi
I'm amazed this tank wasn't worse. Absolutely horrible roads, weather and traffic for the entire tank. Sub-zero overnight lows, icy roads, lots of snow (three separate storms), idiots who don't know how to drive in snow... all conspired against me, but still managed to keep north of 36mpg. Winter is here in earnest.
2011-11-30 452.1 mi
727.58 km
11.369 gal (US)
9.47 gal (Imp)
43.04 L
383.14 kWh
$3.419
($38.87 total for this fill)
39.77 mpg (US)
47.74 mpg (Imp)
5.92 L/100 km
2.51 gal (US)/100 mi
847.47 Wh/mi
Generally favorable driving conditions due to light holiday traffic and mild weather.
2011-11-17 465.9 mi
749.79 km
12.675 gal (US)
10.55 gal (Imp)
47.98 L
427.15 kWh
$3.659
($46.38 total for this fill)
36.76 mpg (US)
44.16 mpg (Imp)
6.4 L/100 km
2.72 gal (US)/100 mi
916.83 Wh/mi
Tough tank. Low temperatures, frosty mornings, snow and icy roads a couple days. Winter sucks.
2011-11-04 468.7 mi
754.3 km
11.9 gal (US)
9.91 gal (Imp)
45.05 L
401.03 kWh
$3.619
($43.07 total for this fill)
39.39 mpg (US)
47.3 mpg (Imp)
5.97 L/100 km
2.54 gal (US)/100 mi
855.62 Wh/mi
One horrendous commute in 8" of fresh snow that demanding no EOC and lots of slow surface street detours, but the rest of the tank was solid and helped to pull things up quite a bit.

Put snow tires on 300 miles into the tank, but as I discovered in the spring when I took them off, the difference is pretty minor and I don't expect a very large change. Certainly the bad roads and slow commutes contribute more to poor mpg than the tires.
2011-10-20 438.3 mi
705.38 km
11.39 gal (US)
9.49 gal (Imp)
43.12 L
383.84 kWh
$3.599
($40.99 total for this fill)
38.48 mpg (US)
46.19 mpg (Imp)
6.11 L/100 km
2.6 gal (US)/100 mi
875.75 Wh/mi
Pretty average commuting with a few good days and a few not-so-good days.
2011-10-07 461.7 mi
743.03 km
11.164 gal (US)
9.3 gal (Imp)
42.26 L
376.23 kWh
$3.699
($41.3 total for this fill)
41.36 mpg (US)
49.65 mpg (Imp)
5.69 L/100 km
2.42 gal (US)/100 mi
814.88 Wh/mi
Lots of good mountain highway miles early in the tank. Nice long EOC glides, good temperatures (only needed AC for about 60 minutes of the entire tank), and good roads.
2011-10-02 407.3 mi
655.49 km
10.527 gal (US)
8.77 gal (Imp)
39.85 L
354.76 kWh
$3.619
($38.1 total for this fill)
38.69 mpg (US)
46.44 mpg (Imp)
6.08 L/100 km
2.58 gal (US)/100 mi
871 Wh/mi
Horrible start to the tank. First day average was 34.5, compared to typical round-trip commute of 38.5-41.5. Worked the rest of the tank to salvage it, but only came about halfway to where I should have been. Ahhh, well, there will be days like this.
2011-09-22 465.4 mi
748.99 km
11.36 gal (US)
9.46 gal (Imp)
43 L
382.83 kWh
$3.799
($43.16 total for this fill)
40.97 mpg (US)
49.2 mpg (Imp)
5.74 L/100 km
2.44 gal (US)/100 mi
822.58 Wh/mi
Almost all commuting tank with good weather days. Some challenging days, but more good than bad. No significant changes except in the weather; we're in sweet-spot weather where the roads are clear and there's no longer any need for air conditioning. Barring a few early storms, these next few months are likely to be the best of the year for me.
2011-09-11 460.1 mi
740.46 km
11.66 gal (US)
9.71 gal (Imp)
44.14 L
392.94 kWh
$3.699
($43.13 total for this fill)
39.46 mpg (US)
47.38 mpg (Imp)
5.96 L/100 km
2.53 gal (US)/100 mi
854.03 Wh/mi
Solid tank. Good start with the drive up and back from Estes Park, but normal commuting brought the tank down to relatively average.
2011-09-04 426.1 mi
685.74 km
10.08 gal (US)
8.39 gal (Imp)
38.16 L
339.7 kWh
$3.84
($38.71 total for this fill)
42.27 mpg (US)
50.79 mpg (Imp)
5.56 L/100 km
2.37 gal (US)/100 mi
797.23 Wh/mi
Tank had BG44k in it which dramatically improved low end, allowing me to drive at lower RPM without getting the hiccup that was coming from a clogged fuel injector. Additionally, this tank benefitted from a roughly half-hour EOC coast from Estes Park to Loveland. On the drive up I was managing 24-27mpg, on the drive down I probably had to start my car for a total of three minutes of the thirty minute drive down the canyon. Excellent tank with some good mountain highway driving on it.
2011-08-26 327 mi
526.26 km
8.44 gal (US)
7.03 gal (Imp)
31.95 L
284.43 kWh
$3.57
($30.13 total for this fill)
38.74 mpg (US)
46.51 mpg (Imp)
6.07 L/100 km
2.58 gal (US)/100 mi
869.82 Wh/mi
Tank had some very hard miles on it, driving up a 10% grade dirt road for one, driving with heavy loads, etc. Also, fuel injectors were getting pretty dirty. At the very end of the tank I got a synthetic oil change, maxed out the tires on psi, and at refueling added a can of BG44k.

Early fill due to weekend plans which were likely to include several long drives, but didn't work out.
2011-08-20 449.4 mi
723.24 km
11.23 gal (US)
9.35 gal (Imp)
42.51 L
378.45 kWh
$3.569
($40.08 total for this fill)
40.02 mpg (US)
48.06 mpg (Imp)
5.88 L/100 km
2.5 gal (US)/100 mi
842.12 Wh/mi
Solid tank. Nothing epic, but only a couple of bad traffic days. Mostly commuting with some weekend errand driving. Oil change (5-20 synthetic) at the very end of the tank. Engine could use another dose of BG44k, but I need to source it again. Starting to get that low end hiccup again.
2011-08-11 454 mi
730.64 km
11.65 gal (US)
9.7 gal (Imp)
44.1 L
392.61 kWh
$3.699
($43.09 total for this fill)
38.97 mpg (US)
46.8 mpg (Imp)
6.04 L/100 km
2.57 gal (US)/100 mi
864.78 Wh/mi
Predominantly commuting tank. Shell refill.
2011-08-01 456.1 mi
734.02 km
12.29 gal (US)
10.23 gal (Imp)
46.52 L
414.17 kWh
$3.779
($46.44 total for this fill)
37.11 mpg (US)
44.58 mpg (Imp)
6.34 L/100 km
2.69 gal (US)/100 mi
908.07 Wh/mi
I thought I'd improve the tank by doing a bit of a road trip. Ooops, wrong way. I had been getting 40.0 on the tank until the road trip, but 100F temps (which forced AC use with the wife in the car), high winds, and the inability to P&G due to the wife in the car killed the tank. Trip average was well below the tank average, at 35.7mpg.

Note to self-if you want to help a tank, do mountain driving, not driving out east where the winds will punish you and you can't coast for miles.
2011-07-25 467.5 mi
752.37 km
11.9 gal (US)
9.91 gal (Imp)
45.05 L
401.03 kWh
$3.779
($44.97 total for this fill)
39.29 mpg (US)
47.17 mpg (Imp)
5.99 L/100 km
2.55 gal (US)/100 mi
857.82 Wh/mi
Got stuck behind a street sweeper with no place to pass for 2.5 miles at 11mph going up a 6% grade. That and some rainy days. Experimented and bought 87 octane for the first time ever with the car (requires 91 octane). Definitely noticeably less power.
2011-07-15 473 mi
761.22 km
12.28 gal (US)
10.22 gal (Imp)
46.48 L
413.84 kWh
$3.609
($44.32 total for this fill)
38.52 mpg (US)
46.28 mpg (Imp)
6.11 L/100 km
2.6 gal (US)/100 mi
874.93 Wh/mi
I ain't buyin' it. The pump at the station wasn't acting right and relative to where the gas gauge was sitting and my SGII, I think I got ripped off. There's no way this was a sub-39mpg tank, hell, I don't see it as possible for it to be a sub-40 tank.

All commuting, but no major traffic issues and some 65mpg runs, so it just doesn't add up to me.
2011-07-05 445.4 mi
716.8 km
10.64 gal (US)
8.86 gal (Imp)
40.28 L
358.57 kWh
$3.799
($40.42 total for this fill)
41.86 mpg (US)
50.27 mpg (Imp)
5.62 L/100 km
2.39 gal (US)/100 mi
805.05 Wh/mi
Exceptional mpg with some relatively routine hypermiling. Two sources likely contributed. First, this was a tank of Shell and every time I fill up with Shell, I seem to manage an extra 1.5-2mpg over Conoco or other stations. Second, I added a can of BG-44k and there was absolutely no doubt that the low end performance improved dramatically. No more bogging below 2k rpm and smooth acceleration regardless of throttle position.
2011-06-23 478.5 mi
770.07 km
12.41 gal (US)
10.33 gal (Imp)
46.98 L
418.22 kWh
$3.87
($48.03 total for this fill)
38.56 mpg (US)
46.32 mpg (Imp)
6.1 L/100 km
2.59 gal (US)/100 mi
874.02 Wh/mi
This was an epic tank right up until about one third of the way in. I was getting over 41mpg for the tank when I got caught in 45 minutes of hell slow and go. From that point on it was just working my ass off to save the tank with mild success.

All commuting miles and again, nearly two weeks of commuting on one tank is exceptional.
2011-06-09 457.4 mi
736.11 km
11.33 gal (US)
9.43 gal (Imp)
42.89 L
381.82 kWh
$3.769
($42.7 total for this fill)
40.37 mpg (US)
48.5 mpg (Imp)
5.83 L/100 km
2.48 gal (US)/100 mi
834.76 Wh/mi
This tank lasted a long time thanks to taking some time off of work. Drives tended to be at non-peak times in lighter traffic than normal. Still not a lot of pure highway driving, but I can't recall the last time a tank of gas lasted me a full two weeks. Very nice.
2011-05-25 459.6 mi
739.65 km
11.53 gal (US)
9.6 gal (Imp)
43.65 L
388.56 kWh
$4.029
($46.45 total for this fill)
39.86 mpg (US)
47.88 mpg (Imp)
5.9 L/100 km
2.51 gal (US)/100 mi
845.43 Wh/mi
Solid tank. Essentially all commutes and local weekend errands. Very little true highway mileage on the tank.
2011-05-16 449.6 mi
723.56 km
11.1 gal (US)
9.24 gal (Imp)
42.02 L
374.07 kWh
$4.059
($45.05 total for this fill)
40.5 mpg (US)
48.66 mpg (Imp)
5.81 L/100 km
2.47 gal (US)/100 mi
832.01 Wh/mi
Long drive to Glenwood Springs and Basalt for a permaculture workshop and back on the same tank. MPG was adversely impacted by the lousy road that leads up to CRMPI (first gear only affair for probably around five miles), but the rest of the trip was a hypermiler's dream. Lot's of extended EOC glides for miles at a time coming off the passes and riverside descents allowing 45-49mpg for miles on end. Nice warm (60s) temperatures for most of the tank.
2011-05-13 451.1 mi
725.98 km
11.65 gal (US)
9.7 gal (Imp)
44.1 L
392.61 kWh
$3.999
($46.59 total for this fill)
38.72 mpg (US)
46.51 mpg (Imp)
6.07 L/100 km
2.58 gal (US)/100 mi
870.34 Wh/mi
Better tank with warmer weather, but one rushed trip across hell and carnation cost me probably 1-2mpg. Running at redline so you're not late for mother's day dinner is not good for fuel economy and mom will never understand the sacrifice I made for her.
2011-05-05 437.1 mi
703.44 km
11.25 gal (US)
9.37 gal (Imp)
42.59 L
379.13 kWh
$4.06
($45.68 total for this fill)
38.85 mpg (US)
46.65 mpg (Imp)
6.05 L/100 km
2.57 gal (US)/100 mi
867.38 Wh/mi
Finally a decent tank. Given the amount of stop and go traffic on the tank it was a pretty good run.
2011-04-25 434.8 mi
699.74 km
11.77 gal (US)
9.8 gal (Imp)
44.55 L
396.65 kWh
$3.94
($46.37 total for this fill)
36.94 mpg (US)
44.37 mpg (Imp)
6.37 L/100 km
2.71 gal (US)/100 mi
912.26 Wh/mi
First full tank with the new summer tires and only 2/3rds of the way through the tank did I discover they were set at 40psi (hot) vs. the sidewall rating of 50 (cold). Brought up the pressure to 50 (hot) for now to evaluate performance and traction before hitting sidewall max.

Still not making the most of my hypermiling this spring like I was last fall. Somewhat uninspired by the winter duldrums, lack time due to spring gardening duties, and not willing to get up at 6am to beat rush hour. Leaving the house at 7-7:15 every morning is killing my mpg compared to leaving at 6:30-6:50. Also, absolutely no open highway driving lately. Everything has been commuting or running errands. That's certainly not helping things either. I need a road trip!
2011-04-14 437.5 mi
704.09 km
11.81 gal (US)
9.83 gal (Imp)
44.71 L
398 kWh
$3.73
($44.05 total for this fill)
37.04 mpg (US)
44.51 mpg (Imp)
6.35 L/100 km
2.7 gal (US)/100 mi
909.71 Wh/mi
Swapped out snow tires for summer tires on Tuesday this week and of course, it snowed 5" Wednesday night. Put up some good highway miles Thursday, but with wet roads outbound and a strong head and cross winds on the way back. MPG was totally killed by weather conditions on Thursday. Prior to that, it was looking like I was heading to very close to 40mpg.
2011-04-09 476.4 mi
766.69 km
12.63 gal (US)
10.52 gal (Imp)
47.81 L
425.63 kWh
$3.799
($47.98 total for this fill)
37.72 mpg (US)
45.29 mpg (Imp)
6.24 L/100 km
2.65 gal (US)/100 mi
893.43 Wh/mi
Still have the snow tires on, but I guess in hindsight I could have taken them off the second week in March. Definitely on the todo list this week.
2011-03-29 462.4 mi
744.16 km
12.32 gal (US)
10.26 gal (Imp)
46.64 L
415.18 kWh
$3.7
($45.58 total for this fill)
37.53 mpg (US)
45.07 mpg (Imp)
6.27 L/100 km
2.66 gal (US)/100 mi
897.88 Wh/mi
It's getting close to that time to re-summerize the car. Snow tires need to come off soon (it's always a crap shoot since we'll still get 1-2 more big dumps of snow into mid-May) and it needs a service. I have a piece of windshield trim that's coming loose and flapping and a misfire under about 2500 rpm when under light acceleration (doesn't seem to do it on hard acceleration for some reason). I'll probably run a can of BG44K through it at the next oil change (which is coming up) and see if that resolves the misfire. Given the plugs were replaced just 10k miles ago (and the last set lasted 125k miles), it's more likely fuel system than ignition.
2011-03-19 475.1 mi
764.6 km
12.09 gal (US)
10.07 gal (Imp)
45.77 L
407.43 kWh
$3.5
($42.32 total for this fill)
39.3 mpg (US)
47.18 mpg (Imp)
5.99 L/100 km
2.54 gal (US)/100 mi
857.57 Wh/mi
2011-03-03 467.5 mi
752.37 km
12.61 gal (US)
10.5 gal (Imp)
47.73 L
424.96 kWh
$3.44
($43.38 total for this fill)
37.07 mpg (US)
44.52 mpg (Imp)
6.34 L/100 km
2.7 gal (US)/100 mi
909.01 Wh/mi
Seemed like a pretty good tank with good conditions, but a little disappointing. Good weather, decent commutes, but no long highway miles to bump it.
2011-02-21 460.3 mi
740.78 km
12.01 gal (US)
10 gal (Imp)
45.46 L
404.74 kWh
$3.2
($38.43 total for this fill)
38.33 mpg (US)
46.03 mpg (Imp)
6.14 L/100 km
2.61 gal (US)/100 mi
879.3 Wh/mi
Much better than the last tank thanks to better weather. Still off my highs of the fall, but I have aggressive snow tires on all four, winter gas, colder temps... I can live with 38. It's better than I ever thought I'd get with the car, so I'll take it.
2011-02-14 378 mi
608.33 km
11.01 gal (US)
9.17 gal (Imp)
41.68 L
371.04 kWh
$3.3
($36.33 total for this fill)
34.33 mpg (US)
41.22 mpg (Imp)
6.85 L/100 km
2.91 gal (US)/100 mi
981.59 Wh/mi
Absolute crap tank. Three snow storms, had to buy new a new pair of snow tires (two were too worn to get me around in 10" of snow), and bitter cold temperatures. Some of my commutes were over 60 minutes (usually under 40) with minutes of stop and go without being able to shut off the engine (couldn't see far enough ahead, too irregular of stops).
2011-02-03 462.8 mi
744.8 km
12.17 gal (US)
10.13 gal (Imp)
46.07 L
410.13 kWh
$3.05
($37.12 total for this fill)
38.03 mpg (US)
45.69 mpg (Imp)
6.19 L/100 km
2.63 gal (US)/100 mi
886.19 Wh/mi
Given the weather and the roads only a significant highway drive spared the mileage to make it a reasonable tank. Lots of snowy, cold commutes.
2011-01-27 436.8 mi
702.96 km
11.69 gal (US)
9.73 gal (Imp)
44.25 L
393.95 kWh
$2.99
($34.95 total for this fill)
37.37 mpg (US)
44.89 mpg (Imp)
6.29 L/100 km
2.68 gal (US)/100 mi
901.9 Wh/mi
Winter is still here, can't seem to get up early enough to beat the rush most days, and rush hour in the snow is a stop and go nightmare. Still, 25%+ better mpg than last year at this time, so no room to complain.
2011-01-19 376.6 mi
606.08 km
10 gal (US)
8.33 gal (Imp)
37.85 L
337 kWh
$3.19
($31.9 total for this fill)
37.66 mpg (US)
45.21 mpg (Imp)
6.25 L/100 km
2.66 gal (US)/100 mi
894.85 Wh/mi
Winter tank. Snowy roads, cold temperatures, no significant highway mileage.
2011-01-11 424.4 mi
683.01 km
11.42 gal (US)
9.51 gal (Imp)
43.23 L
384.85 kWh
$3.14
($35.86 total for this fill)
37.16 mpg (US)
44.63 mpg (Imp)
6.33 L/100 km
2.69 gal (US)/100 mi
906.81 Wh/mi
Winter finally arrived. Two snow storms on the tank along with temperatures dipping into the single digits. Icy, snowy roads, heavy traffic, low temperatures, and the need for heat in the car to keep the windshield from fogging and icing up killed the tank average.
2010-12-28 483.2 mi
777.64 km
11.78 gal (US)
9.81 gal (Imp)
44.59 L
396.99 kWh
$2.86
($33.69 total for this fill)
41.02 mpg (US)
49.26 mpg (Imp)
5.73 L/100 km
2.44 gal (US)/100 mi
821.59 Wh/mi
Another amazing tank. Four consecutive tanks over 40mpg during the winter, no less. December has been mild this year with little snow and few mornings below 24F and few afternoon highs less than 45F, so there's no doubt that has helped. Beyond this, learning to EOC has made a difference of .09-.13 gallons just on my morning commute and perhaps .03-.04 gallons on my way home. That may not seem like a lot, but it's easily a 3-4mpg difference at the end of the tank (10-15%).
2010-12-18 494.3 mi
795.5 km
11.97 gal (US)
9.97 gal (Imp)
45.31 L
403.39 kWh
$2.87
($34.35 total for this fill)
41.29 mpg (US)
49.58 mpg (Imp)
5.7 L/100 km
2.42 gal (US)/100 mi
816.08 Wh/mi
Surprisingly good tank. I even went an extra click to make sure it was really full. My SGII was reading a little low (39.2mpg) as there was a lot more city driving on this tank than the last. Still, lots of EOC, shut the car off at all stop lights, and just good, smooth technique. Recalibrated SGII with current fill.
2010-12-10 513.3 mi
826.08 km
12.39 gal (US)
10.32 gal (Imp)
46.9 L
417.54 kWh
$2.9
($35.93 total for this fill)
41.43 mpg (US)
49.74 mpg (Imp)
5.68 L/100 km
2.41 gal (US)/100 mi
813.44 Wh/mi
Over 250 miles of mountain highway driving under ideal conditions really brought up the average on this tank and made a new tank record possible. Lots of EOC with most commutes now averaging at or over 60mpg compared to low to mid-50s before I started EOC. Mild temperatures also helped.
2010-12-04 393.6 mi
633.44 km
9.69 gal (US)
8.07 gal (Imp)
36.68 L
326.55 kWh
$3.3
($31.98 total for this fill)
40.62 mpg (US)
48.77 mpg (Imp)
5.79 L/100 km
2.46 gal (US)/100 mi
829.65 Wh/mi
Great tank. Several contributing factors including extensive EOC, one great tailwind going to work one day, and some long highway miles going toward Glenwood Springs. Refueled in Silverthorne (thus the ridiculous $3.299 gas). Some long EOC and DFCO.
2010-11-27 418.8 mi
673.99 km
10.65 gal (US)
8.87 gal (Imp)
40.31 L
358.91 kWh
$2.82
($30.03 total for this fill)
39.32 mpg (US)
47.22 mpg (Imp)
5.98 L/100 km
2.54 gal (US)/100 mi
857 Wh/mi
Shocking results given that I'm pretty sure the last fill was a little on the short side, I was running with snow tires, it's been cold as 'ell the last week, and I still haven't put in the block heater. First full tank with extensive EOC and turning the engine off at longer stop lights. Also, at the end of the tank I did a 65 mile trip down to Colorado Springs, then a 77 mile trip back up to the GFs. The final leg showed an average speed of 63, max speed of 84, with an average of about 45mpg! (SGII showed 47.7, but it was off by a half gallon due to a short fill and bad calibration last fill). Before getting off the highway it was showing 48.8mpg with an average speed of 69mph!.
2010-11-19 417.7 mi
672.22 km
10.87 gal (US)
9.05 gal (Imp)
41.15 L
366.32 kWh
$3
($32.61 total for this fill)
38.43 mpg (US)
46.15 mpg (Imp)
6.12 L/100 km
2.6 gal (US)/100 mi
876.99 Wh/mi
Surprising mileage relative to what the SGII was saying, but I had some calibration issues two tanks ago that required a reset, and given the gas gauge seemed to disagree with the scangauge based on my experience, I'm prone to believe the SG was off. There is still the chance this was a short fill, but next fill will make that clear pretty quick. First full tank with snow tires. Inflated to 45 rear (sidewall max) and 52 front (sidewall max) (two different brands). Handling absolutely sucks, but with these tires, they suck whether they're at 32 or 52; I've just been spoiled with performance tires all summer.

Did my first experimenting with EOC on this tank, but still pretty limited. More engine off at stop lights where I could see when it was going to change. Standard time has helped me travel inbound without lights, mostly because I left a little late, which has allowed the EOC. Colder temps, still no block heater, but only two wet commutes the entire tank, more traffic than usual due to late starts.
2010-11-08 228.5 mi
367.74 km
6.23 gal (US)
5.19 gal (Imp)
23.58 L
209.95 kWh
$3
($18.69 total for this fill)
36.68 mpg (US)
44.03 mpg (Imp)
6.41 L/100 km
2.73 gal (US)/100 mi
918.82 Wh/mi
Kind of an off tank. Several short trips within the city, scangauge calibration problems (my fault for screwing around with it, fixed now), a rather windy day, and an early fill so I could recalibrate the SG just threw off the tank. I never knew what I was getting for mpg, thus the game of improvement went out the window. Still a solid tank, far better than just two months ago, but I could have done better. Snow tires on all four wheels put on just before the fill.
2010-11-02 446.7 mi
718.89 km
11.59 gal (US)
9.65 gal (Imp)
43.87 L
390.58 kWh
$2.88
($33.38 total for this fill)
38.54 mpg (US)
46.29 mpg (Imp)
6.1 L/100 km
2.59 gal (US)/100 mi
874.37 Wh/mi
Mostly commuting miles with a couple heavy traffic days, but also some exceptionally smooth days. Stop and go made a serious difference in trip mpg (far more that the WOT did in the last tank). Only one longer flat drive (out to Bass Pro Shops). Cooler/colder weather played a role, but still no snow driving, no working kill switch, and no block heater. I need some wrenching time! 35mph avg.
2010-10-22 335 mi
539.13 km
8.38 gal (US)
6.98 gal (Imp)
31.72 L
282.41 kWh
$2.96
($24.8 total for this fill)
39.98 mpg (US)
47.99 mpg (Imp)
5.88 L/100 km
2.5 gal (US)/100 mi
843.01 Wh/mi
Spectacular tank. I wasn't sure this car could ever accomplish this kind of mpg, but I've seriously adjusted the nut behind the wheel. The biggest change on this tank was modifying my approach and ascent of big hills. Learning to use momentum more effectively, driving with load, driving without brakes, and reducing uphill speed. Includes run up to Idaho Springs and airport run.

Still did numerous WOT accelerations to 75-90mph (because I didn't buy the car for its looks alone). Focused on keeping my climbing MPG over 20, which is a challenge with a 200 pony motor, but in most cases it's doable with discipline. Prior to this tank, I was frequently climbing at 14.5-17mpg for 10 or more minutes with every commute home, now rarely dip below 20mpg for more than a minute on my 1,600' climb home.

No new mods, maintaining 44psi in all tires (sidewall limit).
2010-10-16 310.5 mi
499.7 km
8.77 gal (US)
7.3 gal (Imp)
33.2 L
295.55 kWh
$2.72
($23.85 total for this fill)
35.4 mpg (US)
42.53 mpg (Imp)
6.64 L/100 km
2.82 gal (US)/100 mi
951.85 Wh/mi
Added lower grill block during tank. Colder weather with some nights at or below freezing. No block heater yet. One very bad inbound rush hour drive to work, one moderately bad return drive home. Otherwise, just continuing to work on technique.
2010-10-08 372.9 mi
600.12 km
10.21 gal (US)
8.5 gal (Imp)
38.65 L
344.08 kWh
$2.999
($30.62 total for this fill)
36.52 mpg (US)
43.87 mpg (Imp)
6.44 L/100 km
2.74 gal (US)/100 mi
922.71 Wh/mi
Added scangauge, began significantly altering driving technique. Best mileage to date from the Acura, beats previous best of 34.3. Two bad morning rushhour commutes during the week.
2010-10-01 345.3 mi
555.71 km
10.69 gal (US)
8.9 gal (Imp)
40.47 L
360.25 kWh
32.3 mpg (US)
38.8 mpg (Imp)
7.28 L/100 km
3.1 gal (US)/100 mi
1043.3 Wh/mi
Mix of city and highway with a couple bad rush hours during the week. No mods.

View: spreadsheet friendly fuel log output (for copy/paste)


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