dont use it. You dont need any oil additives with modern synthetic oils. Also, the manual states that if you do any spirited driving, you should do a cool down and wait 5 minutes on idle before turning off your car to allow sufficient cooling of the turbo. But if you drive normal, you can safely turn off your car right away. The Giulia as an electric cooling system for the turbo which cools it after the engine is shut off.I have had several different opinions on the turbo ie.letting the engine idle after driving, to let the turbo cool down, that being said ,has anyone used the ZMAX products in their engine and does it work ?