I got my 2007 mz3 about a month or so ago and I got 32 mpg on my first tank. I was driving it super lightly and not really pushing it, rarely above 4,000rpm, due to the fact that I had only driven stick twice before. Now that I drive it a lot harder I'm getting around 25mpg. Keeping the rpm's...
I want to put ms3 stock catback exhaust on my '07 mz3. If anyone has there's lying around the garage because of installing aftermarket exhaust, I'd be more than happy to take it off your hands.