09-13-2011, 02:31 PM
Ethanol in small engines can definitely cause problems. Ethanol in car engines does not cause problems unless it sits a very long time or you have a really old car (i.e. 1970s or earlier) with gaskets and hoses that are not ethanol-resistant. A 1997 Toyota is not an old car by any stretch of the imagination and will have no problems with ethanol in fuel. It is true that you will get lower gas mileage, but for E10 we're talking probably way less than 1 mpg difference.