text:  The results on ethanol are in, and 10 of the top carmakers say they won't warranty ethanol damage in vehicles using E15 and E85 if they weren't designed to use it. Ethanol absorbs up to 50% more moisture than gasoline, and moisture can cause corrosion on all metal surfaces in your fuel system. You can run corrosion-free with BG's ethanol fuel system defender service. Find a shop in your neighborhood at BGfindashop.com. That's BGfindashop.com. Ethanol may be here to stay, but you can run corrosion-free with BG. BG.