Originally Posted by Snow King
Especially if you drive your car hard, 335i is known to eat quite a bit of oil. I usually have to throw a quart in half way though a regular 7500 mile change. Can certainly vouch for the N54, might be slightly different for the N55.
Edit: If you plan to keep your car post warranty, I would invest in more regular oil changes than the prescribed 1year/15k...
definitely. i was planning on going with the 7500 route. glad to hear that this seems pretty normal.