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经常开车的朋友都知道机油油桶上标有类似“15W/40 SF”一类的标号,但是对这些标号的含义你也许不了解,询问机油经营商,往往也得不到清楚的解释。润滑教室在此给这些朋友一个简要的解释: “SF”是质量等级标号。第一个字母“S”表示的是汽油机用油,如果是“C”则表示柴油机用油,第二个字母为质量
Friends often drive know oil barrels labeled “15W / 40 SF” a class of labels, but the meaning of these symbols you may not understand, ask the oil business, often can not be clearly explained. Lubrication classroom here to give a brief explanation of these friends: “SF” is the quality grade label. The first letter “S” indicates gasoline engine oil, “C” indicates diesel engine oil, the second letter is of quality