Gear Swap vs. Fuel Economy

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Gear Swap vs. Fuel Economy

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02-18-2014, 12:02 PM

#27

DirtyD

Senior Member

Join Date: Jun 2012

Posts: 5,594

Originally Posted by Futwa

My car was originally a 3.31 gear m6 and I got about 18mpg in the city and 22-23 on the highway at mostly 80mph. I got my 3.73's put in today so I'll see what it does to my mpg, I've also got 20 inch wheels and I think my total tire height ends up being around 26 inches.

22-23 @ 80 with 3.31s? Damn, do you stay in 5th gear at 80 MPH or something? I can get 25.5-26 @ 80 with 3.55s.

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