2008 535i , now that temps have dropped I have been getting low oil pressure upon cold starting. Message goes away after 15-30 seconds. Car has 210k on it and change oil proabley every 3000 miles or so, have always ran Mobil 0w-40. Anyway was thinking of dropping the pan to take a peak and also address a pesky pan gasket leak and wondering if the masses are dropping the subframe. Or just the shields and whatever easy components are in way and dropping just the pan?