Well I have read that too but havent seen anything specific on what need to be changed. It is supposed to be slightly corrosive but not as bad as methanol or alchol. It says on most new cars there isnt a price increase on cars that run e85 to regular gas. So I am not sure what needs to changed. maybe fuel lines or rails? but not sure what a e85 car from the factory uses compared to a regular gas car... ANybody have any ideas?