Improves oil film strength by up to 30% and reduces power-robbing friction. This formula is 10x stronger against high temperature oil thickening to unlock maximum performance. This Castrol EDGE motor oil improves fuel economy (0W grades). Product performance claims: A1/B1-12,API SJ,API SL,API SN+,MS-6395,FORD M2C947-A/M2C947-B1,DEXOS1 GEN2,GF-5.