Originally Posted by nathan
I have seen many trucks with over 300,000 miles and still running a compression around 280-300 psi. And not using any oil. I am sure Marc has seen trucks with more miles and in just as good shape. With the higher quality materials put into a diesel engine you can expect it to last a lot longer then a gasoline engine.
plus the fact that diesels run considerably lower RPM's.......the biggest thing with a diesel is maintanence.....its the key to longevity. its tough to predict a motors life. i have seen them with 300-400-500-700 thousand....in fact i have seen one over 950,000 miles and it still ran great. i have also seen them with 50,000 and dusted due to lack of air cleaner maintancence.......check as much history as you can....check the fluid conditions....and look for any signs of neglect....if you dont see any i would think that motor should hit at least 250-300k......and from there who knows...it could be another million mile rig.......Marc