Originally Posted by BMW335icoupe
Ok thanks for the help guys. The main reason I am going to use it is simply for the race gas function. I go down to mid ohio a lot for photography and they have 110 octane race gas. I am simply going to ask my dealer if they will still do warranty work.
Should I have it in writing.
Why would you ask them to write you something. That writing just admits you're modding your car and allows them to void it.