Originally Posted by bikendan
i said it "allows" them to get up to 20mpg. i never said this was while towing. of course, it's a regular v-8 when towing.
but i can get the 20mpg average when i drive from here to Sacramento and back. of course, it's nearly flat most of the way. and i'm not towing!
but my point is that you can get close to 20mpg when highway driving. which is what most v-6 trucks can get.
the public is under the impression that v-8 trucks are gas hogs when the newer ones have nearly identical gas mileage ratings as the smaller and lighter v-6 trucks do.
While not the best I have heard by far on this forum; my 2008 GMC 2500HD Sierra CrewCab 4x2 with Duramax diesel engine and Allison Transmission (3.73 Positraction rear) gets:
Empty - Cruise Control at 65 = 23 MPH Highway
Empty (Generator in back no hitch installed) Around town = 13MPG
Packed for camping and towing 9200 pound 5th wheel
Highway Cruise Control - Tow/Haul ON = 12-13MPG
In town (IE NOT on cruise - Stop and Go type) = 10 MPG average
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW