I run it through a mechanical injector - so it's fat city. The key to keeping the oil clean is getting some heat in the oil. Oil is going to delta up from the coolant, so unless you flat can't get any heat at all you shouldn't have an issue. Yes it's alcohol so it attracts water like methanol, however in use it is not as corrosive as methanol. If varying percentages in the pump blend is a concern with your fueling system you can blend all your fuel down to, for example, 70%. At 70% you'll still get the vast majority of benefit you'd get from E85 but you won't have to worry about the tuneup moving slightly.
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