Aside from aging, which the industry seems to have improved, the problems with using ethanol in old vehicles are two-fold. First is with the carburetor gaskets. If rebuilt with a modern kit, the gaskets are okay. Second is with exhaust valves, which get hotter with ethanol. A valve job with hardened exhaust valve seats takes care of that. I quit using Sta-bil a while back. As long as I burn a tank of fuel about 3 times a year it isn't needed.
