[Gebby]

I wasn't really expecting this. The reflash, if I understand correctly, leans out the air-fuel ratio slightly, advances timings slightly, lowers vtec, and increases redline. I did not think this would effect mpgs at all in a negative way. Of course, if I'm stomping on the gas more often, it will be lower. However, I am comparing pure highway miles with cruise set. Before the reflash, I would get 31 mpg highway in calm weather. slightly more with a tailwind and slightly less with a headwind, obviously. After the reflash, I get 29 mpg in calm weather.

I am comparing the same ~120 mile stretch of road (driving to my parents place). Cruise set at the same speed ~78 mph.

Anyone else have similar results? Everything else is stock on my '06 TSX AT except a K&N airfilter.

 

[H22_J30_K24]

How long have you had it? When did you get the Reflash? I know my mileage drops dramatically this time of year until later in Spring. I've had my Reflash for nearly a year and I haven't noticed a big decrease in MPGs. I also did the CT icebox last summer which adds another variable. If I HAVE noticed any decrease in MPGs it MAY have declined a bit over 70mph... Possibly.