IS 1448 Pt.88-1979

标准号：IS 1448 Pt.88-1979
发布日期：1979/8/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：1.1 This standard prescribes the method to evaluate the following qualities of HD type 1 crankcase oils of all the mono viscosity grades of IS : 496-1979* when used in four stroke compression ignition engines operated under endurance conditions:a) The ability of the lubricating oil to prevent excessive piston groove deposits which could lead to ring sticking; andb) The ability of the lubricating oil to prevent the formation of excessive deposits on the piston skirt and lands.