Originally Posted by PersonaNonGrata

It's always reassuring to hear about 3.0s that are up high in the mileage. I'm at 104,000 in my '02 3.0. I have not changed my trans fluid and so far so good. I've debated doing a partial flush, complete flush, and have decided not leave it alone. I too seem to burn some oil but apparently not as much as yours.

Please explain why you claim Mobil 1 will ruin a BMW engine. I'm curious as I have never heard this.