10w一40机油什么意思

2019-06-28 作者：dongpeng

　　【太平洋汽车】10W-40规格，10代表机油的最低适用温度为零下25度，W代表夏季/冬季通用，40代表机油高温粘度，这个数字越高，机油在高温下的粘稠度越高。

SAE润滑油粘度分类的冬季用油牌号分别为：0W、5W、10W、15W、20W、25W，符号W代表冬季，W前的数字越小，其低温粘度越小，低温流动性越好，适用的最低气温越低；

SAE润滑油粘度分类的夏季用油牌号分别为：20、30、40、50，数字越大，其粘度越大，适用的最高气温越高；

SAE润滑油粘度分类的冬夏通用油牌号分别为：5W-20、5W-30、5W-40、5W-50、10W-20、10W-30、10W-40、10W-50、15W-20、15W-30、15W-40、15W-50、20W-20、20W-30、20W-40、20W-50，代表冬用部分的数字越小（适用最低气温越低），代表夏季部分的数字越大（适用的最高气温越大），适用的气温范围越大。（图/文/摄：太平洋汽车网董鹏）

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