It all depend's on how tuned your car is and what you use it for e.g track day's or just everyday driving i put 5/40 full synthetic in mine and the oilman said that would be fine as it's standard and i only use it for everyday driving no track day's or anything. If you want to know what oil to use give him a PM with the spec and what you use your car for and he'll tell you what will be best