自2009年年初以来,通用公司Dexos 1规格引起了广泛的关注,尽管Dexos 1性能要超过GF-4/SM,但Dexos1和GF-5都将使用合成基础油(API III类或IV类),均符合Dexos1要求的诺亚克蒸发损失小于13%,因此有人认为使用合成油生产的Dexos 1与GF-5规格油品性能相当。以目前基础油价格来看,使 General Motors Dexos 1 specifications have drawn widespread attention since the beginning of 2009 and Dexos 1 and GF-5 will use synthetic base oils (API Class III or IV), although Dexos 1 outperforms GF-4 / SM, Noack’s Evaporation loss, which meets Dexos1 requirements, is less than 13%, so some people think that Dexos 1 and GF-5 oils produced using synthetic oils have comparable performance. Base on the current base oil prices, so