I am curious about something. I din't know that Kubota made the D600 engine in a gas and diesel version. Besides the obvious of fuel type, is there a big difference? How about life? My diesel version I know will run a LONG time. How will the gas version do. Are the gas versions easy to work on. Are they as good? I am just curious because this really threw me off guard. Plus I would like to know the differences in case I ever came across one I may want to buy.