Originally Posted by SamS
Who said it was an F82? Sound money says it's an F80 under there.
SCOTT26 says 20-25% better fuel efficiency. Sounds good on paper, but still not great. If I get 14mpg right now in my E92 M3, that kind of improvement will only yield me 17-18mpg. I would think an F80 M3 with a revised N55 could get to within 1-2mpg of what the F30 335i can get for fuel economy.
I get 19 mpg on the M3. ( 70% highway )