I called the dealer my car was serviced at before I purchased...
It had a service at 10k and 15k, I bought it at 17k, I changed the oil at 20k, and sent in a sample to blackstone. They came back saying it was 10W-30.
...
Why on EARTH would a BMW dealer throw that crap in the s54?
Needless to say, I won't be setting foot in that dealer's service dept, even if they were cheaper than an indy shop.
Yes I did know going in what maintenance it had, it showed up on the carfax.
The surprising thing is the fact that the BMW dealer put that oil in, not the chevy dealer I bought it from. Makes me wonder if Crevier put 10W-30 in at the 10k mark too...
I'll be doing inspection 1 here very soon, so I'll take some pics with the valve cover off and I'll post a full report of valve clearances/shim replacements.