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1969 GMC · 05-18-2003, 11:51 AM

My dad used to have a late 70's C10 with the 250, he said that it got crappy gas mileage, even worse than some of the V8 cars hes had. Those inlines have a really low comp ratio, which may be why. Probably if you built one to run higher comp and a few other doodads, you could get better mileage.

05-18-2003, 11:51 AM	#6
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	My dad used to have a late 70's C10 with the 250, he said that it got crappy gas mileage, even worse than some of the V8 cars hes had. Those inlines have a really low comp ratio, which may be why. Probably if you built one to run higher comp and a few other doodads, you could get better mileage. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650