I have the Cummin's Diesel HO. The truck has been great overall. Towing is fabulous, and so is the gas mileage, even at the higher diesel prices. In the city. I'm getting14MPG, and on the freeway, up to 25MPG, which is a lot better than the gas counterpart! The only problem so far is the power steering went out for a couple of seconds twice. So they are replacing it now, within 500 miles of the warranty expiration!