Well, here the story on the tractor. It was purchased last fall from an estate auction and an old man had it kept inside and seen very little if any work other than brush hog about a 3 acre lot once or twice a year. Filters were really bad and all filters and fluids replaced. It has 1900 some odd hours on it. It leaks a little diesel fuel but thats probably some loose bolts and needs looked at. But the oil problem is really worrying me. I am using 15-40 diesel oil. The oil pressure seems good until oil gets real low. The motor is strong until you go uphill pulling a load. I would not think it would need overhauled do to the hours on it, but maybe the lack of normal use has something to do with it. I don't think the is any oil coming out the exhaust (no has hit me in the face) but it smoke real bad when pulling hard. More than a normal tractor. Don't know much bout engines other than the filters and fluids need changed often and minor repair stuff. So open to ideas or thoughts.