They are a little expensive but I put a set of Michelin Pilot Sport Cups on his M3. They worked well on a hard launch and stuck well in the corners. Drag radials are not made for cornering.
No it wasn't this winter. I know winter blend fuel cuts into mpg. This was prior to this winter. The UDF off Georgesville rd has had the new fuel since August. That is where I usually get my fuel because they are at least four cents cheaper.