I ran my 335i in the Atlanta region STU. It's pretty brutal for a 335i. I now run an extensively tuned e36 m3 and i cant say its much better.
1995 M3 Coupe - HPDE/Track Prepped - For Sale
1997 M3 Coupe - BMWCCA I-Prepared Race Car
2011 335d - Das Uber Commuter (35.1MPG Avg)