Thanks for the replies Cessna, Furball, and 1Outlaw! ;D The ethanol is commericailly purchased high purity 200 proof and is reformulated with some weak acids and then utilized for an industrial process. I'll need to test for water and pH level. There might be a trace amount of water but no sulfer in the ethanol solution. My main concern is the acids. The diesel engine oil is a good idea for buffering the acids. I imagine the possible soft metals in the fuel system might be aluminum, copper? I assume the F150 fuel system materials are designed for E10 fuel utlized in most states during the winter. Once I test pH of E10 and then a mixture of the 20%, 30%, 40% ethanol, I'll let you know what I get for data. If pH is close to E10, I'll probably try running a 20% mixture, then try 30%-40% like Furball has done.