The development of JASO GLV-1 -Next Generation Low Viscosity automotive Gasoline Engine Oils Specification
It is a common understanding that reducing engine oil viscosity has a great effect on improving fuel economy. However, it has been impossible to evaluate ultra low viscosity engine oil below SAE 0W-12 utilizing the existing fuel economy test method and there is no specification for ultra low viscosity gasoline engine oil. Therefore, we developed firing and motored fuel economy test methods using Japanese automobile manufactures’ engines for ultra low viscosity oil at the Task Force (hereafter called TF) mainly consist of Japanese automobile and petroleum industry. Furthermore, the TF developed JASO GLV-1 specification including these fuel economy tests for next generation ultra low viscosity automotive gasoline engine oils such as SAE 0W-8 and 0W-12. In development of JASO GLV-1 specification, Japanese fuel economy tests and ILSAC engine tests for engine robustness evaluation were used.