7.Main performance requirements including engine and bench tests for ILSAC GF-4 and ILSAC GF-3 gasoline engine oils were discussed. To anatomize the newest northern American gasoline engine specification of ILSAC GF-4,comparison and analysis was made between GF-4 and GF-3,including automotive emission exhausts after-treatment system,anti-wear and antioxidant performances,aged oil (EOT) low-temperature viscosity performance, fuel economy improvement ability.
介绍了ILSACGF-4与ILSACGF-3标准对汽油机油性能的要求,并对它们在汽车尾气排放系统兼容性要求、抗磨损及抗氧化性能要求、旧油低温性能要求和燃料经济耐久性要求等方面的差异进行了比较,剖析了北美最新汽油机油规格ILSACGF4。