[ksa8907]

Originally Posted by aerohead

Not too long ago, Don Sherman, of CAR and DRIVER Magazine reported that their long-term, 40,000-mile test Denali, non-hybrid, returned 20-mpg ( and I'll guess it was at around 70-mph ), absorbing 44-horsepower at 70-mph. He did not specify whether this value was 'Road Load-hp' or SAE-hp. If it was SAE-hp, that would yield a BSFC = 0.4882-pounds/ bhp-hour, at 70-mph.
18-mpg @ 80, pulling, is something to talk about.

Well, it only does 16mpg with an empty car dolly at the same speed so... As we all know, aero is king on the hwy.