m5board.com Site Sponsors
Join Date: Aug 2008
Location: New York
Thanked 2,532 Times in 1,482 Posts
This is an interesting phenomenon with the S62 that I have experienced on my personal engine as well. It does NOT necessarily mean you have coolant in your oil. If you want to confirm, you need to have the oil analyzed. There are some aftermarket test kits for this IIRC, if you want to do the test yourself.
My explanation is that the S62 has lots of nooks in which oil hides unless and until the engine sits for an extended period. Pull the dipstick at that point, and it almost always reads too high.
The decrease in coolant, however, is indeed indicative of an issue IMHO. Blown head gasket or cracked block are the two leading candidates. Sorry if either of those proves to be the case. I've seen both.
Managing Member of
Partee Racing, LLC , The S62 Shop, LLC, and The S54 Shop, LLC