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09 Subaru Impreza 2.5i, 4WD, Sedan, UEL headers, Dual 2.25" Tsudo Catback, ECU reflash, Delta Cams, STi sways & springs|Boxer 2.5L SOHC|20/26 EPA|Aero Kit|170hp/148awhp|2980lbs|0.31 Cd|
The production was not really intended for mpg here. Im sure this was another attempt at fast and furious 1/4 miler car. simple to fix find the recipe for high speed race car switch the part/s that does not work to the benefit, then try hyper mileing her again. The reflash is most suspect here.
Now I do have a similar issue with my Dakota R/t but overall if I could raise my final drive ratio it would be achieving V6 hiway numbers, after all the hipo stuff Ive done to it.
It is my playtoy and work truck so I dont plan to get higher than 20mpg as said It does better than it should already.
At this point your best chance is to do the throttle pulse method since your car is very efficient at acceleration only. [Now mabe these other eco masters can help you!]
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