I have a bmw 318IA MODEL 2002, when the car gets warm, I can see white smoke going out from the exhaust. I don't see the smoke when I turn the car neither while driving it on the highway. After it warm up and I stop for seconds and I drive again the white smoke gets worse
It could be from condensation in the exhaust system. Also, it could be from coolant entering the combustion chamber. Keep an eye on the coolant. If it gets low, have it checked for a leaking head gasket.