Thanks a million for the quick intelligent responses. This is a Great group! The smoke is not dense, not oily and does not smell. I’d guess carbon or unburned fuel.
I usually use Castrol TWS for oil changes, but have used Castrol Syntec 5w50 in a pinch for topping off or for an occasional oil change. Does everyone believe that you get what you pay for with TWS? How often should the oil be changed? Is using Syntec risky?
As far as the comment regarding smoke from the tires, as I’m sure you are all aware, traction control does not help the rubber from evaporating from the rear tires during acceleration. For some reason, I need to add tire pressure every two weeks.
I’m also intimately familiar with old Porsches dumping unburned fuel out of the exhaust. My 930 shoots flames so long that I’ve been black flagged on the race track. However, I thought that the M5 computer would not let this occur.
I purchased the M5 at an auction with 60,000 miles and never performed a scheduled maintenance. It now has 114,000. I thought a valve adjust may be in order.