Quote:
Originally Posted by engineer_gregh
Dave I just spit coffee out my nose laughing at 18-20 mpg with a long bed 69 GMC truck. No disrespect, so please don't get mad at me.
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Me too. A 2017 Silverado with a 5.3 and a 6l80 gets 16/22. A bigger motor with half the gears and a carb will never live up to that.