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Grant-53 · 12-01-2014, 11:53 PM

Best mileage I saw back in the '80s was the county highway superintendent's GMC 1/2 ton converted to a 3-51 diesel with a Clark 5 spd transmission. He got 22 mpg and carried saddle tanks for range. No aero mods.

12-01-2014, 11:53 PM	#24 (permalink)
Grant-53 Master EcoModder Join Date: Feb 2010 Location: Elmira, NY Posts: 1,790 Thanks: 320 Thanked 360 Times in 299 Posts	Best mileage I saw back in the '80s was the county highway superintendent's GMC 1/2 ton converted to a 3-51 diesel with a Clark 5 spd transmission. He got 22 mpg and carried saddle tanks for range. No aero mods.