Hi, bioethanol washes out the cylinder walls and prevents an oil film in such a way that the mocking grooves and piston rings wear out more and more quickly? Well-known over 3 corners works in an institute where this is supposed to prevail during engine trials, so to speak as a “by-product” to the actual purpose. He says, about factor 8-10. So 10tkm E85= 100tkm of petrol ride….knows what from experience what? Does one control his combustion rooms with a “periscope”?