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I have some trouble believing 15+ mpg from those pigs unless someone is sharp & made some improvements geared toward mileage increases, in the stock form in our trucks, nah. 9-11 is what I've seen/hear. Now the 3-4 your getting...something is wrong here. Either your gallons, math, someone stole it, it's leaking...something! Running rich isn't making it THAT bad. Check it again if it really bothers you. Lorne
I've gotten 15.8 mpg traveling 60 mph on the interstate with my 454 C20 4 speed with the 3.21 gear out back so it is possible. Bone stock with 127K miles and all the emission controls still on the truck.
Quote from: zieg85 on May 26, 2011, 07:42:11 PMI've gotten 15.8 mpg traveling 60 mph on the interstate with my 454 C20 4 speed with the 3.21 gear out back so it is possible. Bone stock with 127K miles and all the emission controls still on the truck.Well hush my mouth ...I would concider you a credible source & if one would, I could easily see it being the one you describe...non 1-ton with pretty much highway gears, manual trans. in a flat part of the country. Good Deal! Zieg, What does it get around town being used as a normal vehicle? Lorne