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ChampagneSW2 · 08-20-2008, 10:57 AM

I can't imagine any "setting" or variable in the ECU that would care about tire size or a change of tire size. Did your overall diameter change? This could show worse mileage due to odometer/speedo error.

08-20-2008, 10:57 AM	#8 (permalink)
ChampagneSW2 EcoModding Lurker Join Date: Jul 2008 Location: Novi, MI Posts: 16 Tupper - '97 Saturn SW2 90 day: 37.52 mpg (US) Thanks: 0 Thanked 0 Times in 0 Posts	I can't imagine any "setting" or variable in the ECU that would care about tire size or a change of tire size. Did your overall diameter change? This could show worse mileage due to odometer/speedo error.