Hi All, I hear all sorts of stories about engine oil and effects on the Turbo's. What is the best grade engine oil for use with the 300 Z twin turbo. A mate who is an excellent builder of turbo rotaries tells me that he sees a lot of rotors with damaged Turbos due to the incorrect lower viscosity oil. Then someone tells me to use a higher viscosity with a high Zinc content to prolong Turbo life. So now I am confused. Thoughts please. Thanks and cheers, Chris.