Forum Discussion
Grit_dog
Mar 03, 2015Navigator
Well I've owned or had company trucks with just about every gasser offered except the new 6.4 Rams, 6.2 Chevy and 8.1 Chevy and I can say with certainty that every one of them averaged between 11 and 14mpg on the highway. Never drive slow enough to squeeze 17 out of anything with a gas V8 so your truck is right on par. Wouldn't expect the 5.7 to do much better than the 6.4 apples to apples. With today's fuel and ignition management, they all use about the same gas for the amount of hp required for the condition at hand.
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