2008 BMW 335i Base 6 Cyl 3.0L
I added an engine Restore product to the engine. Then i noticed problems after the start. When at Idle speed the engine
I guess you failed to read the Owners Manual regarding non approved engine oils and additives! You must use only approved Motor Oil like Bmw's brand or Castrol synthetic. You need to get the Auto to a quality Bmw Mechanic and flush the system out. Bmw Engines are of very close tolerances and engine restore fills in small scrapes on the piston walls. If you had a car with over 150k you might want to use it but nothing new.