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68longhorn · 03-14-2011, 05:46 PM

I get about the same with my 86 swb. It has a stock, 140,000 mile 305 with a q-jet with a cat back exhaust backed by a 700r4 and 2.73 rear. I get 16-17mpg mix of city highway and 18-19 all highway. Even better is my 1978 Caprice with a GMPP 350 H.O. backed by a th350 and 2.41 gears gets about 26mpg all highway. This makes me think with a fresh motor my truck could get better!

03-14-2011, 05:46 PM	#18
68longhorn Registered User Join Date: Jun 2007 Location: Cape Coral, Florida Posts: 1,123	Re: Impressed with my truck's mileage. I get about the same with my 86 swb. It has a stock, 140,000 mile 305 with a q-jet with a cat back exhaust backed by a 700r4 and 2.73 rear. I get 16-17mpg mix of city highway and 18-19 all highway. Even better is my 1978 Caprice with a GMPP 350 H.O. backed by a th350 and 2.41 gears gets about 26mpg all highway. This makes me think with a fresh motor my truck could get better! __________________ 1986 Custom Deluxe 10 1978 Caprice 2 door - sold 1937 Chevrolet 2 door sedan - project