interesting.. both the admission that e85 is not an aggressive fuel in regards to rubber type hoses and that e15 is aggressive , doesn't add up in my mind unless they got some of their data from testing done to make the case about the proposed changes from e10 to e 15 , I would more readily buy that e15 can cause lean conditions from certain stock vehicles not having enough of a window to adjust to stoich with the fuel than that ethanol causes more issues at 15% than at 10% OR 85%
