I recently bought an 04 STI, and was running it on 5-30 mobil 1, then noticed the oil level was slowly going down week after week. I changed it out for 5-40 t6 recently and the same thing is happening. When I accelerate hard a little black smoke comes out of the exhaust. (Turbo Back catless exhaust) I've also been running a Napa Gold Filter. I was wondering what you guys run in your cars, and if there is anything to worry about
Thanks, Austin
Thanks, Austin