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If your engine is marked 'use 5W30 oil only' could using 10W40 cause any engine problems? |
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Answer
5W30 is a viscosity rating, In simple terms resistance to flow. 10W40 is a thicker oil in extreem winter climate you could experiance hard stating.If you use a synthetic or partially sythetic oil you will be better off.
Answer
i tried it in my 95 monte carlo 99,000 miles.it triggered service engine light to come on.going tomorrow to put 5w30 back in it.
First answer by ID0000000000. Last edit by ID1108881481. Question popularity: 70 [recommend question]
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