100% synthetic engine oil - designed to meet the special requirements of manufacturers. Designed to meet the most stringent requirements of high-performance engines, including those from General Motors and those requiring API SN or ACEA C3 specifications. Fuel economy. Passes ACEA Ml 1 IFE fuel economy tests (CEC-L-54-T-96) with minimal fuel economy improvement of 1.7%. Designed to meet General Motors requirements. Passes GM RNT GMPTE-T DUR021 valve wear test for cam wear and valve lift. Passes GM, GMPTE-T MEC024 aeration test. Passed the GM internal test on gasoline engines (OP-1) GMPTE-T DUR020 for viscosity increase, TAN and TBN. Passes GM test on diesel engines, GMPTE-T DUR019 for wear, cleanliness, oil consumption, increased viscosity and low temperature pumpability. Increased durability and excellent wear protection. Passes ASTM Sequence VIII bearing corrosion test. Passes the Sequence IVB wear test for valve control wear. Unmatched engine cleanliness. Passes the ASTM Sequence IIIG piston deposit formation test for increased viscosity, piston deposits and cam and pusher wear. Passed the VW TDI test for piston cleanliness and ring grip. Passes the VH Sequence mud test. Passes the M271 engine sludge test Excellent carbon control. Passes DV6C medium temperature oil dispersion test. Shell Helix Ultra Professional AG 5W-30 has been approved by General Motors for use in petrol and diesel engines in accordance with their strict specification GMW16177 (dexos2). Formulated to meet the requirements of the dexos2 specification which includes API SN, ACEA C3 and General Motors internal tests on petrol and diesel engines. Specifications, approvals and recommendations: API SN, ACEA C3, General Motors dexos2 License GB2B0611014