Good Morning folks, I have recently retired an old Allis 160 when the perkins 152 diesel died. I think I broke the crank, and the engine was the best part of the tractor. I"ve replaced it with a larger green diesel tractor, but I really miss my little easy on fuel tractor for mowing and chores. While I"m keeping my eyes open for a perkins 152 at the right price to drop into the Allis, I"ve started thinking about finding another little tractor. So I"ve been reading about the MF 150 and 165 diesels. I like that the 150 has the same 3 cyl perkins that is so good, and gets such good economy. However, it looks like a 165 could pick up some of my heavier work if my big green was down. How"s the economy of the 4 cyl 165 diesel compared with the 3 cylinder 150 diesel? Any other differences I should consider between the 150 and 165?