I did the 3,000 hour oil change on the older Dixie Chopper last night. I'm not sure if it's the extra Amsoil by pass filter, the Donaldson air filter, or just good luck, but it still runs like new. Repair work on this 22 HP Command engine has been an intake manifold gasket and I replaced one module on the electronic ignition. There has been several discussions on which engine is best, Kawasaki, Kohler, ect, ect. I've had both, but this is what I would get in this order on another machine. Yanmar diesel, I feel is the best, have 2 of them, had 3 total. Kohler is number two on my list, I've had 3 of them. Then Kawasaki, I've had 3 of them. The money you save on fuel on a diesel will pay for the machine over the extra years they can last which is a big plus. The old Kohler is running strong and I'm hoping to get another 1,000 hours or more out of it.