"So when running E85 and considering long term impacts of an engine not actually designed for it, do you need to run a more resilient oil or anything because my thoughts would be that Ethanol is breaking down the oils in the engine substantially quicker? If solvent is getting into oil and 90% of oil filters are paper based, is E85 risking breaking down filters that again aren't specifically designed for it?" Great question, one I wanted to know too. Especially about the fuel filter part