Quote:
Originally Posted by BonzoHansen
Fill tank, note mileage. Drive. Fill tank, note gallons pumped and mileage. Miles driven/gallons = mpg. Over time you will see the average mileage. It’s the only decent method you can use.
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Refer to post #3 i also did this i nearly do this every time i fill up my car
Quote:
Originally Posted by Tru2Chevy
For LS1 M6 cars, that spot is typically in the 70-75mph range (roughly 2,000 rpm)
- Justin
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Ive done a ton of highway driving and even when i had 3:42 gears on a factory tune my best mpg was closer to 60mph on cruise. Im not your average driver 90% of my driving is on the interstate, i live a 1/4 mile from the interstate and have done the long trip from NC-NJ 10 total times, every time i do testing from when the gas pumps click/ miles i have traveled.
Back when i had 3:42's and factory tune
My gas mpg's went like this
60mph gas mpg = 32
65mph gas mpg =31
70mph gas mpg 30
75mph gas mpg 29
80mph gas mpg 27-28
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2000 Pewter Trans am, M6, SLP Lid,LS6 intake,Kooks 1 7/8" Long tube header,Classic Chambered Powersticks, hurst,off road X-pipe, Strano springs & Koni's, Monster level 2 clutch, HPtuners wide band tuned and a homemade ram air box sealed off.
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