My ol' 94 set 5 yrs. on concrete. It was started and made a run around town about every 6 mo. "no tags". Pretty rusted up undercarriage. Not dealing with it at the time, I got away w/replacing fuel filter, w/no leaks. Time is soon in coming, the lines will need replaced. I'll be going w/nylon......looks to be very durable and a whole lot easier to deal with. IMO