Thanks Ender! The research paper was very interesting to me. As a clarification to others. I am in support of BMW hardening the fuel system if it can be done cost efficiently. But I am not in support of manufactures and consumers having to spend money simply because the USA has a stupid and corrupt government. Both when I worked for volvo and now working for BMW, fuel system damage is predominantly a USA thing. Both volvo and BMW have fewer fuel issues in brazil then the USA. Considering the alcohol content of brazillian fuel is far higher, this is clearly not a simple issue. It may be that byproducts from corn ethinol (USA) are more damaging then sugar cane ethinol (Brazil), but I suspect it is more of a lack of additives, quality control, regulatory inspection and enforcement. I am not apposed to ethinol, but am apposed to fuel that eats fuel systems that hold up fine nearly everywhere else in the world. This problem varies from state to state, station to station, and even tank to tank, and it should be fixed at the source in my opinnion. Once again, thanks Ender.