After a 4 month rest, with battery tender on, I just had over half cup of oil gurgle up out of the breather vent in the edge of the carb on my 2013 M3W when I went to start it. Yes, I blipped the throttle a bit trying to start it....
Drained the oil & refilled it. Chainged the oil filter & spark plugs and even drained the oil from the small drain bolt at the very bottom of the engine dry sump area).
Then I also changed the cam belt and installed the new style vented cam cover.
Started up right away with no oil leaks!
