Quote:
Originally Posted by joey8383
I would love to know how everybody achieves these high mpg's! I have owned a FEW 5.3 trucks and a 4.8 truck and always avg 13-14 mpg. Maybe 16-17 on all highway. Maybe I drive faster..
All the cummins guys claim 20+ mpg and I have had 2 24 valve 5.9's and a 6.7 cummins and even though the display shows 17mpg, on paper it always came out to 12-13 mpg.
OP, Big power+fuel efficient= LS. No doubt the LS based engines will beat the sbc in every aspect.
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Nope, they aren't telling the truth or they just wish they got all of that fantastic mileage....16-17 on the highway is about right. My 2007 5.3 powered Silverado gets 16-17 all day on the freeway much less around town. Never higher. But, then, it has the aerodynamic characteristics of a small building just like every other pickemup truck..