It would not be the first time BMW has failed to disclose all. Remember that Brazil and other ethanol using countries put additives in that prevent the acidity and tendency to attract water. I spend $150 a year on engine treatment fuel additive and ride around 20,000 miles between all of my bikes. All my bikes get the same fuel treatment at $0.38 per gallon cost. Even my 2 carbed bikes like the cleaning treatment. It just seems crazy to not spend a little preventative money if you live in an ethanol crazy state.