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Go Back   IWSTI.com: Subaru STI Forums > STi Technical Discussion > ECU Tuning & Performance Electronics


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Old 05-18-2008, 05:41 AM   #31
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Default Re: WTF gas mileage (need some advise)

Last tank was 24.5 mpg.
This is on a very loose piston engine with 820cc injectors and a 20G. What I found that really raised my mpg is DRIVE SLOWER. I went from 19mpg to 24.5mpg just by slowing down on the highway. I started cruising at 60 mph instead of 80mph.
Now I will start to use a few tricks to get it up even further. High tire pressure and lean burn. Then I might start doing some areo mods.


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Old 05-18-2008, 06:51 AM   #32
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Default Re: WTF gas mileage (need some advise)

my car is still hanging right around 19-20, i tried going back to the OTS stg2 map and it made very little difference other than it was extreemly slow compaired to my protune maps when you've got a car this fast for so long i think you forget what you've got untill you take a step back with it
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Old 05-18-2008, 06:59 AM   #33
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Default Re: WTF gas mileage (need some advise)

Did you guys check your tire pressure? That can play a very big role in gas mileage.
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Old 05-18-2008, 05:41 PM   #34
rgt
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Default Re: WTF gas mileage (need some advise)

I went stage 2 (ots) yesterday and plugged in my AP and did the average fuel economy live data.

My jaw hit the floor. I really hope the ecu needs time to adjust. Right now its saying 10-11mpg.


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