cam my 5.3 or go 6.0

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Jan 27, 2012 | 09:15 AM

#21

axekick

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From: Austin, Tx

Quote:

Originally Posted by Beau@SDPC

MPG in a 5.3 compared to a 6.0 will be a minimal difference at the same power level in the same type of vehicle with same gear/converter/tire size. I guarantee you a stock 6.0 gets no worse/no better MPG than my H/C 5.3, and will make around the same power. MPG is based on more than just the engine. Personally, I would go 6.0 and build from there.

I agree with this. It takes a certain amount of power to move a certain amount of weight and it takes a certain amount of air and fuel to make a certain amount of power. Since modern engines keep the average air fuel ratio steady, and the 6.0 doesn't weigh any more than the 5.3, your fuel mileage won't be much different, unless you're on it all the time. The 6.0 will be capable of moving more air thus burning more fuel if you ask it to.