Here's some interesting facts from test results reported in the Sept '07 Consumer Reports.
Overall MPG (no load)
Tundra 5.7 15
Chevy 6.6 TD 13
Ford 6.4 TD 10
Dodge 6.7 TD 13
Highway Towing MPG (7400 lb load)
Tundra 5.7 8.5
Chevy 6.6 TD 10.5
Ford 6.4 TD 9.0
Dodge 6.7 TD 10.0
Acceleration Towing 0-60 (7400 lb load)
Tundra 5.7 16
Chevy 6.6 TD 17
Ford 6.4 TD 19
Dodge 6.7 TD 19
IMO, Tundra 5.7 holds it's own very well with diesel p/u's, at least with the 3/4 ton diesels. It costs an extra +/- $8K to say Turbo Diesel on the fender, fuel is +/- $0.40/gal more than gasoline and oil&filter changes are +/- $100 vs $30.
