1. Does the M3 need premium gas? I put 93 in it, but I was not sure if I could run anything else. (no mods)
2. Were is the best place to run wires through the firewall. I need to run a line for my remote radar detector.
3. The drivers side door handle feels like it sticks. I have to pull harder on it than the passager side. Could something be out of alignment in the door?