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2026. 6. 30. 작업

난이도 & 준비물

난이도 쉬움⏱ 예상 30~60🔧 잭스탠드

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Is it normal for the oil to be dark in color right after an "oil change" in a 10-year old diesel car?

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It's a Diesel, which means that you usually have a high detergent oil in an engine that dumps combustion by-products like soot into the oil as part of its normal operation. Given the age of the vehicle I'm not surprised that the oil has noticeably darkened after 10 miles - one of the older Diesels I owned a while back did that during the time it took to run up the engine after the oil change and fill the oil filter. Also, when changing the oil, you'll never get all the oil out of the engine so the new engine oil will mix with a little oil that already contains combustion byproducts. This is nothing to worry about (it's usually a very small amount of oil that is left in the engine), but it'll also lead to oil darkening fairly quickly.

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