 New fuels are being sold at gasoline filling stations in certain locations. Today, you can buy gas with 15% ethanol, 30%, or even 85%. But these ethanol fuel blends are not best for your mower, chainsaw, or generator. I'm Chris Kaiser, president of the Outdoor Power Equipment Institute, to remind you to look before you pump. Only use gasoline that is E10 or less in your small engine equipment to keep it running strong.