2015-03-06 658.7 9.59 $2.399 68.69 "Base tank - no mods installed yet"
2015-03-25 657 9.74 $2.369 67.45 ""
2015-04-09 645 9.35 $2.419 68.98 "Changed out the EGR valve that was malfunctioning about halfway through the tank.
Replaced it with a 2000 Accord V6 EGR valve, it's functioning perfectly so far. 52 bucks on Ebay with a gasket"
2015-04-25 705.5 9.8 $2.499 71.99 "Changed my route at the start of this tank, resulting in a 3 mpg increase.

Added the clutch switch and aero side mirrors right at the end of this tank, I'll see if there are any beneficial results next tank.

April 26 - Grid charged for 36 hours"
2015-05-13 704.6 9.58 $2.579 73.55 "Another 700+ mile & 70+ mpg tank with carpooling!
Had four days of short trips added in."
2015-06-01 725.3 9.45 $2.649 76.75 "Last true hypermiling tank for the season.

Next tank I'm using AC on Econ the whole tank to see what I can do. Getting too hot to leave the windows down!"
2015-06-18 705.5 9.68 $2.629 72.88 "Carpooled most of the tank, using AC on Econ setting"
2015-07-08 681.1 9.72 $2.599 70.07 "About all I can do since I'm running the AC now."
2015-07-26 691.1 9.85 $2.499 70.16 "Man it's hard to break 70 mpg in this heat!"
2015-08-12 703.1 9.515 $2.319 73.89 "Little better tank, it's been raining a lot so I didn't have to use the AC as much
I'll need to pull off the moon discs and air up the tires after the next tank, haven't pulled them off since I installed them"
2015-09-04 716.7 9.85 $2.169 72.76 "Came in on fumes again, at zero bars for 20 miles.

I'm considering going to a second or third click again when I fill up so I can go over 700 miles without risking burning up the fuel pump

Probably will start doing it again next tank"
2015-09-16 421.4 5.43 $2.059 77.61 "Test tank to see if filling at half a tank gets the FCD closer to the actual mpg. Test confirmed (but will try this same method on the next three or four tanks to see if it's consistent)!
Really weird result, because the FCD was showing 76.8, so the actual mpg was higher than the FCD at half a tank, where it is usually 2-4 mpg lower than the FCD shows at a full tank.
Stayed with the first click on this tank, used my usual pump, filled in the morning like usual, carpooled the same as usual, no route change, etc . . .so the only difference was filling at half a tank i.l.o. a full tank."
2015-09-28 410 5.69 $1.989 72.06 "Lol, so much for the theory that half tanks keep the FCD closer to reality. FCD showed 76.3 mpg, which is as far off as it ever was on a full tank. I'm going back to full tanks now, don't like stopping for gas that much anyway!"
2015-10-13 692 9.55 $2.149 72.46 "FCD read 74.7"
2015-10-29 434 5.94 $1.949 73.06 "FCD read 74.2"
2015-11-13 441.7 5.75 $2.159 76.82 "FCD read 77.0 mpg - that was the closest to the actual mpg it's ever been in this car
Weather was a little cooler this tank so I didn't need to use the AC at all

Nov 15 - Discharged IMA down to 20V and grid charged 36 hours"
2015-12-01 501.3 6.88 $1.949 72.86 "FCD read 76.1 mpg"
2015-12-23 628.5 8.69 $1.939 72.32 "FCD read 75.2 mpg"
2016-01-06 403.2 5.25 $1.889 76.8 "FCD read 76.8, meaning it read the correct mpg for the first time since I have owned an Insight!

Jan 8 - Oil change with Mobil-1 full synthetic 0w20 and Mobil-1 filter @ 123,511 miles"
2016-01-21 617.8 8.78 $1.749 70.36 "FCD read72.1 mpg

Jan 20 - Pulled the moon discs and filled tires back up to 60 psi"
2016-02-02 449.2 5.74 $1.699 78.26 "FCD read 76.0 mpg

Weather warmed up, helped me have a good tank!"
2016-02-18 682.2 8.947 $1.659 76.25 "FCD read 75.2

Decided to go ahead and fill up before I hit 700 miles so I could get it at my usual pump."
2016-03-09 698.3 9.37 $1.799 74.53 "FCD read 77.3 mpg

Seems like when I start the tank with 80+ mpg and it drops to the final mpg the FCD reads lower than actual mpg. If I start out lower than 75 mpg and work my way up to the final mpg the FCD reads higher than actual mpg."
2016-03-29 705.6 9.255 $1.969 76.24 "FCD read 77.7 mpg

So much for that thought! I guess the FCD just gets within 3 or 4 mpg one way or the other no matter what."
2016-04-25 715.2 9.32 $1.919 76.74 "FCD read 78.2

May 1 - Discharged IMA down to 40V and grid charged for 36 hours, put the OEM side view mirrors back on, adjusted the door poppers, and fixed the low beams with a new snap plug"
2016-05-16 662.2 9.236 $2.049 71.7 "FCD read 74.2 mpg

Think the IMA battery is shot, two straight weekends of discharge/grid charging haven't brought it back. Drove most of this tank without any assist or autostop."
2016-06-08 701.4 9.77 $2.269 71.79 "Success!
Broke 70 mpg even without the IMA functioning

FCD read 73.5 mpg"
2016-06-28 705.6 9.29 $2.089 75.95 "FCD read 77.3 mpg

Second full tank without any IMA functions"
2016-07-20 719.1 10.011 $2.059 71.83 "First time I have ever put that much gas in an Insight!

FCD read 74.2"
2016-08-16 634.4 9.136 $1.989 69.44 "Bunch of short trips with the AC killed this tank! Worse than that is the AC died most of the way through the tank, so it's a pretty hot ride now"
2016-08-29 445 6.28 $2.179 70.86 "Went ahead and filled up since I was doing maintenance/reviving the IMA battery this weekend

FCD read 73.5

Oil & filter change Mobil 1 0W20 with Pure One filter at 131,000 miles"
2016-09-14 668.1 9.383 $2.059 71.2 "FCD read 72.3

About as good as I can do in summer with the failing IMA battery."
2016-09-28 710.2 9.81 $1.999 72.4 "FCD read 74.9"