[TheMoyers]

First, your cart or auto will run on both the ethanol or non-ethanol, as long as you follow the octane recommendations. Higher octane is OK but not lower. Lowerwill cause pre-ignition (ping).
The non-ethanol gasoline is primarily for use in vehicles or small gas engines that are vented. If a tank is vented, and you use ethanol gasoline, the ethanol will absorb oxygen via the vented tank, and form a cloudy substance that will clog your system. If you don't believe me, use it in a chain saw, and leave it in there for a few months, and you will have to spoon it out of the tank.
All autos in the last 30 years have tanks that are not vented, so the ethanol is OK. So modern autos can burn either one. So can golf carts with non-vented tanks. Use ethanol in a tank that is vented, and you are asking for problems. If you do use ethanol in a vented system, runit dry everytime you use it, then put some engineered fuel in it and run it for an additional 5 minutes until it runs dry. Get that at Lowes or Depot. It's expensive, but will save you a lot of grief. I always use it in my generator, after using ethanol gasoline.