"Doug Winterburn" wrote in message
...

Some of the "really big" vehicles do pretty well. My '04 Silverado 2500
Duramax diesel (6500 lbs) gets 21 mpg highway at 75mph and 14.5 mpg
towing a 10,000 lb 5th wheel at 65 mph.

Damn. My '01 F250 PowerStroke (6500+ lbs) would make a whopping 18 if I
kept it at 65 all day.
My pard's '96 Dodge Cummins (now with over 300k and a 3.55 rear end)
gets 23at that speed - damn it.

Dave in Houston