+1 for shell rotella T6 5w40 here. i haven't done a change in the BMW yet (waiting for supplies...), but i will likely run that.
a long time ago, on another car, i used mobil 1... then i was burning oil. i switched to castrol syntec, and the consumption just about stopped.
fast forward a few years, and i was still using castrol syntec - different car, this one was turbocharged and had 300K miles on it. it ran well but used about a quart between oil changes. i switched to shell rotella T6 5w40 after an oil-nut friend of mine recommended that i try it out. well, i just sold that car (326K miles when it sold) and after switching to rotella T6 i essentially stopped using oil altogether on that car - amazing. i run it in my A4 1.8T and have zero oil consumption issues in that too.
i live out in the sticks, so availability is important too - and 30mins away at my local walmart i can get shell rotella T6 (the nearest BMW dealer is 2.5hrs away). it's $35/5-liter jug here in canada, everything costs more up here...
my $0.02.
peter
peter
2004 330i ZHP
2005 330iT ZHP
2010 328iT M Sport