I won't belabor this much more, only to say that in the early 2000's, the Chevy diesel had many injector problems and the Cummins had exhaust manifold issues, injector issues and their trannies(both auto and manual) were horrible. The Ford 6 leaker not only had major engine design problems, but until the Torqueshift tranny came along, the auto/6 leaker package was a real mess. Dead 6 leakers were everywhere. Ford owners that bought the 6 leaker after having such good luck with the 7.3, sold and traded their 6 leakers for Chevy's and Dodges at a record pace. Even with knowledge that those companies had engine issues too, but the problems with the 6 leaker out-weighed everything else. I wonder if Ford would ever let the public know how many 6 leakers they bought back as lemons and then re-sold to some fool thinking they got a really good deal on a low mileage Ford diesel. Anyway, the 6 leaker is still my pick for the worst Ford engine ever made.