5w20 is thinner and gives a better fuel economy (and also slightly higher power) but also a higher wear. 5w30 provides the better protection while not being too thick to flow through the oil channels in the engine.
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Using a thicker oil or one with a higher viscosity may also be helpful once your car reaches 100,000 miles. Or you can opt for oil additives that help stop leaks. Just keep in mind that thicker oil will make it harder to start your engine in cold weather
前者低粘性，润滑性好，但似乎对引擎和低温地区的冬天不利；后者高粘性，有利于高里程数的车和延长引擎寿命，似乎寒冷地区的冬天容易启动引擎。
看得晕头转向，似乎更倾向于5W20机油，尽管用5W30也无大碍。
强，十六年 up to 17.5万miles 基本不消耗机油。
5w20 is thinner and gives a better fuel economy (and also slightly higher power) but also a higher wear. 5w30 provides the better protection while not being too thick to flow through the oil channels in the engine.
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Using a thicker oil or one with a higher viscosity may also be helpful once your car reaches 100,000 miles. Or you can opt for oil additives that help stop leaks. Just keep in mind that thicker oil will make it harder to start your engine in cold weather
冬天的标号是W前那一个，冷的地方可以用小标号。横线后那个标号是正常行驶发动机温度下的粘度标定，不要自作主张换别的标号的。
https://www.energy.gov/energysaver/motor-oil-grades-and-classifications-explained
我也姓周。