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- - Gas Mpg (https://oldsmobileforum.com/forum/cutlass-25/gas-mpg-269/)

twinswin91

Aug 29, 2005 06:44 PM

Yes i know the 307 is not the most fuel efficent motor out there but I was wondering what the average mpg would be it has a turbo 350 trans. right now im getting maybe 10mpg any suggestions

455pwrd80ctlass

Aug 31, 2005 12:44 AM

with a V8 and a 3 speed turbo 350 that is about all u will get. maby try high flow exhaust? maby a tune up?

texasred

Aug 31, 2005 01:13 PM

Get your intake fixed first. Then check mpg.

C.J.

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