There are lots of E10 fuel additives on the market now. Like the one I linked in post 5, most indicate they are designed to counteract the 'corrosive' effects on materials in the fuel system susceptible to the increased alcohol levels of the new fuel.
Are you saying this is not the case, and is there any data out there to demonstrate this ?
Cheers Spike
Audi has said the FSI is not compatible with E10, but, crucially, have not said which part or parts are affected. Most likely to be in the fuel system, from and including the high pressure pump through to the injectors, but this is pure speculation on my part.
I can't see how an additive can counter the effect of 10% alcohol on unknown "fuel system" components, when the components (and their constituent parts), are unknown. Knowing a bit about the effect of fuels, and fuel additives, on synthetic rubber seals, I doubt that an additive will prevent it. Only the correct choice of materials (PTFE, Nitrile, Neoprene, Viton, Silicone, and lots more) can do that.
Does the additive manufacturer warrant that his additive will not, itself, damage any part of your car? Probably not, how could he?.
I may be wrong of course, but I certainly won't be using one. Only additives I use are those added by a big brand oil co (Shell for me).
Mac.