The problem with e10 is if it sits all summer in your gas tank without proper fuel treatment it will separate from the gasoline. This can cause the ethanol to act as a solvent and if there are any impurities in the tank (rust,dirt,water) it will break it down and this can clog injectors or carbs . You will be fine if you properly treat the fuel with Stabil marine or K-100. Do not use heet or any alcohol type water remover.