Mine also runs LM MoS2 along with Castrol 5-40W A3/B4. I've been cleaning out oil sludge since I bought it. No more smoke at start up or hard WOT. During an oil plan gasket replacement, a ton of sludge was removed. The inside looked bad. I think previous owners ran it to oil the maintenance light warning. Over two years, the oil has cleaned up. Now, at half oil life, I like to swap the oil filter for a new one. Even at 5k miles, the oil coming out looks good. Oil top offs intervals are getting longer. Sealing oil seeps sure does help. A new valve cover gasket should get the last big seeping areas.

The latest, trying the LM Ceratec.

__________________
'06 X5 3.0i - bought @143,123 miles (12/26/20)