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8,815 Posts
Diesel is the way to go...I know that the 6.0L gasser isn't the best on mileage. On the highway unloaded I can get 18-19 mpg and in town I get 15-17 mpg. Towing, I get about 12-14 depending on the time of the year. (winter diesel sucks) There is a greater repair cost with diesels, but the engine is covered by a 5yr/100,000 mile warranty that is a $100 deductable after the 3/36000 mile warranty is up. Now, it you are looking at the 07s, the warranty is 100,000 on the truck. Under normal use, the engine should be pretty much trouble free. The people that have problems with the engine are usually self inflicted. Once you tow with a diesel engine, you won't want to go back to gas.