Wolf's Head Super-Duty Semi-Synthetic 5W-30 is formulated to exceed the latest API SP and ILSAC GF-6A engine oil categories. A blend of high viscosity index oil, synthetic base stocks shear stable viscosity modifiers and the latest additive technology. It is specifically formulated for the rigorous environments of gas-direct engine (GDI) and turbo gas-direct engine designs as well as providing increased protection for carbureted or normally fuel injected engines. The Wolf's Head Super-Duty Semi-Synthetic 5W-30 engine oil offers improved performance for wear control, oxidative stability, piston cleanliness, and chain wear over previous API and ILSAC oil categories.