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Every car needs a certain type of oil. The manufacturers usually tells you what kind of oil to use. Putting 10w30 oil in a 2005 corvette could really hurt the engine but putting it in a 1999 to 2004 Chrysler 300 M is perfectly acceptable. Considering you didn't say what model of car, this question is very hard to answer. The simple answer is to use the oil grade recommended by the manufacturers of your car.

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Q: Does using 10w30 oil hurt your car?
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