Originally Posted by e92involved
Probably the most surprising part about this kit for me was the MPG. I have a 45 mile commute each day and when I drive this car at an 80 mph cruise I achieve 30 mpg! I couldn't believe it at first, then I tested it manually at it was dead on. Obviously, when you dig in the gas pedal itís less but I still get an average of about 26-28mpg all the time!
That would probably be world record for mpg on an E90M3. On some cars, onboard computers are no longer accurate when larger injectors are fitted. I know you say you also did a manual calculation of the fuel, but I would do another test or two since these numbers are so far outside of what anyone else has ever reported.