I just bought an 06 ford f250 w/ the 6.0 diesel engine and have heard all the pros and cons about these trucks. I have plenty of power to tow my camper and work trailer, does not smoke,and does not leak. The only problem I am having is poor fuel mileage, empty or loaded it will not get much better than 10/12 mpg. Friends have told me I need a free flow intake, exhaust, and a programer. One would have to think that a stock truck should get better mpg before all the add ons. The dealer has recmmended a 300.00 fuel system cleaning but I am not interested in spending 300 on something I just bought because it is considered routine maintenance.

Using full-synthetic lubricants in the engine, transmission, and differential should increase gas mileage at least 10%. Look into installing a by-pass engine oil filter, in order to get your money's worth from the synthetic engine oil.