E90 EXHAUST ISSUE
I have ~3000 miles on my Oct build e90 (330i S/P), and have noticed that the left exhaust emits considerably more black gook than the right.
Is there a specific reason for this? Is this something that I should be concerned with?
MY 06 E90 - ED (Nov 05), Alpin Weiss, Tera, Sport / Premimum, Navigation, Comfort Access,