Quote:
Air Filter, first 15K miles Amsoil dual stage foam (cleaned at 10K of test)
- got paranoid due to perceived total lack of lip seal, and went back to stock Mann paper
- no difference in seat of pants output performance noted either way. Dirt numbers proved my paranoia
to be totally unfounded, but will stick with Mann paper, because BMW study showed great flow #'s,
fit is perfect and no sticky oil to deal with.