Quote Originally Posted by Chris GTO TT View Post
10w40 or 5w40 are the only oils I'd run in a turbo car. 10w30 shears too fast and once is shears you are lacking protection in a motor that produces a lot of heat.
conventional 10w40's and 5w40's will also sheer. it's too great of a temperature split for conventional to handle. full synthetic only is what's needed. and i still love rotella t6.