Gas Mileage??
Thread Starter
Registered User
Joined: Apr 2007
Posts: 56
Gas Mileage??
I've fix/changed a lot of parts on my Z28 (all in my sig) and after all is said and done with my gas mileage is horrible now. I get appx. 13 mpg. Any idea what could be causing this? I used to get right around 20 mpg. Any suggestion is welcome!!!!
Registered User
Joined: Jan 2002
Posts: 710
From: Gulf Breeze, Fl. USA
out of curiosity, 13mpg city or highway? where did you get the ECM? was it tuned? was it tuned specifically to your car? ive got an m6 in my car with my setup and average around 20mpg highway. if it was tuned, i would think about getting it redone/checked out.
Last edited by slverbullet; Jul 14, 2008 at 09:37 PM.
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