BMW 540 ENGINE SYMPTOM

So The 540i Has 150,000 Miles On It. Has A Rebuilt Transmission (at 110,000), Rebuilt Engine At 65,000 For Some Recall On The M60's (...

My Vehicle Is Using Oil. There Are No Leaks Underneath The Vehicle At All. What Could Be The Problem?

I, M New To Your Site, And I'm Looking To Buy A Used 1998 Bmw 540i. I Drove A Car Today That I'm Interested In Buying. 2 Problems 1)when...