Originally Posted by rcornelius
Is anyone with a new M3 using anything other than Castrol Oil??? I've spoke with several dealers and even called the Toll Free Service Number and everyoe told me that Mobil One 15W 50 would be just fine. I've been a Mobil One user for some 25 years, I'm just not a big Castrol Fan after all of these years with Mobil. Anyone else using Mobil One?????????
Castrol TWS is far better than your garden-variety Castrol, as it ought to be for $9/liter. I would stick with this, as it is what you will get at the dealer for your free services, and the factory has extensively tested it. No sense to differ for in-between oil changes (to save $30?).