Originally Posted by HondaGoneRogue
No octane boosters. Thought that was basic knowledge a LONG time ago. Search for why.
Not all octane boosters are the same. Other than usually wasting your money as the benefits don't quantify the costs it could be enough to clean up the OP's logs.
2008 135i - Cobb/JB4, Spec 3+ Clutch/Flywheel, MS DP's, Berk street exhaust, AMS IC, UI CAI, CDV delete, Quaife LSD, M3 control arms/Links, RE Toe Link, ECS Trailing Arm, M3 rear SF & Trans bushings, SS brake lines, Michelin PSS.