前面越小在coldstart时越幼越轻。后面是在高温后的浓度。因为机油遇热会变幼,engine热的时候不能太幼因为越幼越没lubricate做用。
冷车时越小w越好warm up 不会拉拉着。
还有要看na车还是turbo车
还有 mineral base,semi ,fully 的 grade 也不一样就算 w数一样
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