Sounds like you're due for a ring job. You're getting cylinder blow-by which forces oil through the crank case breather plumbing and into your air cleaner housing. For the time being you can install a crank case breather filter, but I wouldn't be modding the engine for more power if the rings are shot.deathlucky wrote:it was blowind oil out the air box the other day. would i use a heaver oil to help that like 15w-50?