Well, I needed to fill up the gas tank on the C5Z today, so I drove up to the Sunoco on south Monroe that has ethanol free 93 octane gas. They also have some 112 octane race fuel, but it's right pricey. The 93 octane stuff was $4.25 per gallon.
Anyway, I feel like I am doing my part to help the hungry of the world by not using fuel with additives coming from food items.......
But I'm sure I won't be able to find ethanol free gasoline everywhere I drive, unfortunately.
So far the only difference I could detect was that my engine wasn't surging going down my road at 8 mph like it normally did.