Well. So far i have not seen any smoke at stop lights. But I don't have it idle for long. I poured half a can of seafoam into the engine and drove for a few hundred miles. I also sprayed carb cleaner into the ccv diaphragm and hoses. I may have a oil leak from the oil cap. It seems like seepage. Its not obvious. There are no other leak around and behind the valve covers.

I also noticed the n62 engine runs hot. As i opened the oil cap i see vapors comming out. This was from a 5 mile trip to the grocery store. I'm sure oil in that heat breaks down way before bmw's recommended 15k mile oil change. :/