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Fuel log graph
Efficiency log for: BDC's Honda CiViC HX/Si - 1998 Honda CiViC HX/Si (HX Shell/Si Swap)
  • Lifetime Fuel Economy: 40.66
  • 90-day Fuel Economy: 40.68
  • 3-tank Fuel Economy: 40.54
  • EPA Rating (% over): 25 (62.72%)
  • Total fills: 78
  • Average cost per gallon: $2.62
  • Average cost per fill: $23.29
  • Average cost per mile: $0.06Total gallons used: 692.29
  • Total miles traveled: 28148.2
  • Total cost: $1813.79
  • Total saved: 433.64 gallons
  • Total saved: $1136.14
  • Average tank distance: 360.87
Fill date Distance Fill amount Price MPG Details
2009-09-22 381 mi. 9.823 US gal $2.499 38.79 US Valero + Acetone
2009-09-14 516.3 mi. 12.82 US gal $2.559 40.27 US Valero + Acetone
2009-09-02 417.4 mi. 9.786 US gal $2.599 42.65 US QT + Acetone
2009-08-26 384.4 mi. 9.764 US gal $2.599 39.37 US Valero + Acetone
2009-08-19 385.7 mi. 9.502 US gal $2.599 40.59 US Valero + Acetone
2009-08-12 385.7 mi. 9.882 US gal $2.599 39.03 US Valero + Acetone
2009-08-04 347.1 mi. 9.266 US gal $2.499 37.46 US Acetone #41 - Valero @ 0.00075%

Been running the air conditioner full-time during the past month or so. Hottest July on record!

See comment below on low mileage reading.
2009-07-29 384.7 mi. 8.833 US gal $2.459 43.55 US Acetone #40 - QT @ 0.00075%
Obviously a short fill...
2009-07-23 410.2 mi. 9.921 US gal $2.399 41.35 US Acetone #39 - Valero @ 0.00075%
2009-07-15 447.1 mi. 10.85 US gal $2.479 41.21 US Acetone #38 - 7-Eleven @ 0.00075%
2009-07-08 380.4 mi. 9.879 US gal $2.559 38.51 US Acetone #37 - Valero @ 0.00075%
See comment below on low mileage reading.
2009-07-02 580.6 mi. 13.09 US gal $2.599 44.35 US Acetone #36 - Multiple Brands @ 0.00075%
Obviously a short fill...
2009-06-24 421.7 mi. 9.836 US gal $2.659 42.87 US Acetone #35 - 7-Eleven @ 0.00075%
2009-06-17 220.1 mi. 5.274 US gal $2.599 41.73 US Acetone #34 - Valero @ 0.00075%
2009-06-12 253.3 mi. 6.172 US gal $2.619 41.04 US Acetone #33 - 7-Eleven @ 0.00075%
2009-06-10 490 mi. 11.42 US gal $2.479 42.91 US Acetone #32 - 7-Eleven @ 0.00075%
2009-06-01 210.5 mi. 4.832 US gal $2.339 43.56 US Acetone #31 - 7-Eleven @ 0.00075%
2009-05-29 416.8 mi. 9.778 US gal $2.339 42.63 US Acetone #30 - QT @ 0.00075%
2009-05-21 500.4 mi. 11.46 US gal $2.199 43.66 US Acetone #29 - Chevron @ 0.00075%
2009-05-09 242.4 mi. 5.962 US gal $1.759 40.66 US Acetone #28 - 7-Eleven @ 0.00075%
2009-05-05 282.1 mi. 6.61 US gal $1.769 42.68 US Acetone #27 - 7-Eleven @ 0.00075%
2009-04-29 452.2 mi. 10.71 US gal $1.799 42.22 US Acetone #26 - QT @ 0.00075%
2009-04-22 413.1 mi. 10.33 US gal $1.799 39.99 US Acetone #25 - Valero @ 0.0015%
2009-04-15 407.3 mi. 10.35 US gal $1.719 39.35 US Acetone #24 - QT @ 0.0015%
2009-04-08 406.3 mi. 10.08 US gal $1.799 40.31 US Acetone #23 - QT @ 0.0015%
2009-04-01 322.1 mi. 8.229 US gal $1.819 39.14 US Acetone #22 - Circle-K @ 0.0015%
2009-03-26 424.9 mi. 10.6 US gal $1.819 40.08 US Acetone #21 - QT @ 0.0015%
2009-03-19 378.9 mi. 9.009 US gal $1.859 42.06 US Acetone #20 - QT @ 0.0015%
2009-03-13 420.5 mi. 10.44 US gal $1.899 40.28 US Acetone #19 - Valero @ 0.0015%
2009-03-05 423.8 mi. 10.99 US gal $1.899 38.56 US Acetone #18 - Valero @ 0.0015%
2009-02-27 460.1 mi. 11 US gal $1.999 41.83 US Acetone #17 - Shell @ 0.0015% - w00t!
2009-02-20 416.4 mi. 10.43 US gal $1.939 39.92 US Acetone #16 - Valero @ 0.0015%
2009-02-13 410.5 mi. 10.43 US gal $1.899 39.36 US Acetone #15 - Valero @ 0.0015%
2009-02-06 414.1 mi. 10.58 US gal $1.799 39.14 US Acetone #14 - Valero @ 0.0015%
2009-01-27 434.7 mi. 11.04 US gal $1.899 39.38 US Acetone #13 - Chevron @ 0.002%
2009-01-22 417.2 mi. 10.48 US gal $1.839 39.81 US No Acetone #7 - Switched back to Chevron.

Now that I've purged my fuel system, I'll give Acetone another whirl - being more diligent this time with my measurements. I'll start off at 0.002% and see how it goes from there.
2009-01-15 388.2 mi. 10.47 US gal $1.679 37.08 US No Acetone #6 - Gulp! Switched to Valero.
2009-01-06 481.8 mi. 12.08 US gal $1.439 39.88 US No Acetone #5 - Switched to QuikTrip (QT).
2008-12-29 422.3 mi. 11.03 US gal $1.439 38.29 US No Acetone #4 - Switched to Shell Gas.
2008-12-22 373.1 mi. 9.625 US gal $1.499 38.76 US No Acetone #3 - Switched to Chevron gas.
2008-12-17 402.5 mi. 10.5 US gal $1.499 38.33 US No Acetone #2 - Good thing gas is cheap!
2008-12-08 328.2 mi. 8.412 US gal $1.559 39.02 US No Acetone #1 - Let's see what happens!
2008-12-04 408.8 mi. 9.556 US gal $1.679 42.78 US Acetone #12 - Throwing caution to the wind, I doubled the amount of acetone that I normally put in the tank. Guess it worked! I'm so conflicted...
2008-11-29 372.6 mi. 9.766 US gal $1.799 38.15 US Acetone #11 - OMG!!! I tested my theory of running too much acetone, so I left it out on this tank. This sucks!!!
2008-11-23 320.3 mi. 7.901 US gal $1.919 40.54 US Acetone #10 - Dude, I'm about ready to give up on this stuff!
2008-11-17 345.1 mi. 8.385 US gal $1.979 41.16 US Acetone #9 - Raced somebody again (sigh). Put my 15's back on, yada, yada, yada. LoL! But who cares? $1.97 gas! Are you kidding me???
2008-10-30 434.9 mi. 10.25 US gal $2.559 42.43 US Acetone #8 - That's better! I've run some of the Acetone out of the tank, and only added about 1-ounce for 10-gallons this time instead of 2-3 ounces as recommended on most sites. We'll see what happens...
2008-10-25 172.5 mi. 4.222 US gal $2.739 40.86 US Acetone #7 - Dang it! I'm convinced I got too much Acetone in my tank, so I'm not adding any this time. And, I'm going to run the tank down to empty to get rid of some of it...
2008-10-21 259.4 mi. 6.343 US gal $2.899 40.9 US Acetone #6 - I dunno... Got stuck in freeway gridlock, one day, and drove the last 20+ miles on city streets. We'll see what happens on the next fill.
2008-10-18 166.6 mi. 3.881 US gal $2.999 42.93 US Acetone #5 - Cut back even more!
2008-10-14 171.3 mi. 4.167 US gal $3.099 41.11 US Acetone #4 - That's better! Started cutting back on the mixture.
2008-10-12 167.4 mi. 4.136 US gal $3.159 40.47 US Acetone #3 - WTF!!! I *think* I'm adding too much. Plus, QT diddled around with 'my' pump...
2008-10-09 169.9 mi. 3.947 US gal $3.179 43.05 US ACETONE #2 - Well, well, isn't this interesting?!?!? I got back to my normal driving routine, and this is an all-time personal best, if I'm not mistaken. Let's hit the submit button and see what happens...
2008-10-07 171.7 mi. 4.246 US gal $3.219 40.44 US ACETONE #1 - Wasn't expecting much this fill. Mostly city driving with the A/C on 100% of the time, going back and forth to meetings. Last time I did this, I got like 38 MPG, sooo... not bad, all considering!
2008-10-01 166.4 mi. 4.003 US gal $3.299 41.57 US Okay, the 'top off' experiment was a relative success. Didn't do a lot for my FE, but topping off the tank ever 2 days HAS improved consistency. Now, I'm going to try adding Acetone for 1000 miles, starting with this tank - 1 ounce per 5 gallons.
2008-09-28 168.1 mi. 3.948 US gal $3.319 42.58 US Ahhh! That's better...
2008-09-24 136.9 mi. 3.421 US gal $3.339 40.02 US Racing... again...
I'm really trying to stop - REALLY I AM!!!
2008-09-21 186.1 mi. 4.467 US gal $3.379 41.66 US Another 2-day Top-off.
2008-09-17 166.4 mi. 3.987 US gal $3.379 41.74 US 2-day Top-off. Looking good!
2008-09-14 166 mi. 3.91 US gal $3.419 42.46 US New Theory: My ride gets better FE on a full tank. So far, so good! Gonna 'top it off' for 1000 miles or so, and see what the net result is...
2008-09-10 349 mi. 8.448 US gal $3.419 41.31 US Couldn't pass up $3.41 gas! Still using QuikTrip gas. This stuff rocks - consistently great gas mileage without having to drive like an old lady!
2008-09-02 394.8 mi. 9.694 US gal $3.499 40.73 US Drove a depressed friend around town for 4 hours (and half a tank of gas) listening to music and discussing life with the A/C running full-time. Still got 40+ MPG, so all is well that ends well, I guess.
2008-08-26 437.1 mi. 10.64 US gal $3.499 41.08 US More QT gas. Drove a lot faster on this tank - was running late to work on two separate days, but no harm, no foul evidently!
2008-08-18 431.6 mi. 10.13 US gal $3.599 42.61 US Tried a tank of QuikTrip regular. Not shabby!
2008-08-12 411 mi. 9.913 US gal $3.669 41.46 US LoL! Extended racing killed me on this tank - but I kicked that %$@# ass 5 outta 5 stoplights! Could have done it all night, but he got stupid and started cutting lanes, trying to run into me...
2008-08-07 425.4 mi. 9.926 US gal $3.779 42.86 US Drove a little slower on this tank.
2008-07-30 413.1 mi. 9.859 US gal $3.849 41.9 US That's better! Behaved myself...
2008-07-24 135.2 mi. 3.455 US gal $3.959 39.13 US Slipped into bad habits - raced a guy - knew I wasn't gonna get good mileage - so I topped off and started over.
2008-07-21 354.7 mi. 9.194 US gal $3.999 38.58 US WTF! Lots of city driving with the A/C on - a couple of days of stop n' go on the freeway - a 'purple face' road rage incident - plus I overfilled the tank, spitting sh!t all over the side of my car and tire!
2008-07-14 364.3 mi. 8.664 US gal $4.019 42.05 US Shell Regular - A/C - mostly highway driving.
2008-07-08 943.9 mi. 23.71 US gal $4.079 39.81 US Did several 2 gallon 'short fills' to see if keeping my tank low improved mileage. It did - NOT!
2008-06-23 450.8 mi. 10.62 US gal $4.099 42.45 US Tested how many miles I could get on a tank.
2008-06-16 344.8 mi. 9.051 US gal $4.139 38.1 US Mostly city driving. Starting using A/C...
2008-06-07 366.1 mi. 8.679 US gal $4.099 42.18 US Getting better at fighting the urge to 'race'.
2008-06-03 409.4 mi. 9.876 US gal $3.929 41.45 US Switched to Top Tier Regular gas (Chevron)
2008-05-27 383.8 mi. 9.337 US gal $3.799 41.11 US Decided to stop 'racing' ppl every day.
2008-05-21 373 mi. 9.63 US gal $3.729 38.73 US Switched to Regular gas full-time.
2008-05-16 353.7 mi. 9.349 US gal $3.699 37.83 US Mixed 50/50 Premium/Regular gas.

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