Originally Posted by jzchen
We are really off topic, (sorry OP,) but I don't know if dealers' always use BMW oil. Anyways. Go to Castrol's website. Use the "Which Oil to Buy" link. None are listed...
Valvoline's MST part number, if you are interested in ordering from places like NAPA: 787301. Since they say HST is formally approved and MST is not, I'm still going to stick with BMW oil because I'm not buying a 55 gallon drum of oil. Only 5w-40 HST as listed here:
shows a Total Base Number (TBN) of 10, which like I said before is an indicator for longevity.
BTW- My wife's oil looked pretty thick when it had 120 or so miles until red/due. She last had the oil changed at the dealer, so I'll see next time I do a change how it looks, now that I know for sure I put BMW oil in...
I tried to look it up on the castrol website when I first got the car and I was extremely confused also, I didn't know why it didn't have a number on the website but the cap says "castrol."
Originally Posted by Socom
won't last the factory interval for US gassers. Probably ok for 7k mile OCI.
Castrol 0w30 & 5w400
Easiest to get other than dealer oil
So should I stick with mobil1 0w-40?