You would have to ask that question! I have heard that from most of my close friends, which are diesel owners. I do not know diesels, nor gas engines after computers took over on gas. This 7.3 ford, has priced itself out of my market. with repair money, over the last 3 years. Everything diesel, is exorbent, either parts wise, or shop prices. I am tired of supporting the diesel people, but still need a one ton duelly, trailer puller.