Question about 1998 Buick Century

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I put (possibly a cup) of antifreeze accidentally into the oil in my car. My brother said I'm okay if when I check the oil it does not look white and foamy. It does not look white and foamy..it just looks dark. Am I okay?

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Change the oil and filter immediately. When you mix antifreeze and oil, the oil loses its ability to lubricate as well.

Posted on Jan 02, 2011

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Hi,
No you are not O.K. Antifreeze will scour your bearings.
No offense meant against your brother. Drain oil and replace oil filter.
Wayne

Posted on Jan 02, 2011

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If white smoke is present, check to see if the proper amount of antifreeze is inside the radiator and the overflow bottle. Also check to see if antifreeze has contaminated the engine oil. You can look at the engine oil dipstick, or look at the under side of the engine oil filler cap. If the oil is contaminated with antifreeze, it will have the appearance of a chocolate milkshake. Do not start the engine if the oil is contaminated with antifreeze, as serious internal engine damage can result.

How did antifreeze get in the oil or cylinder in the first place? The engine probably overheated and a head gasket failed due to excessive heat, thus allowing antifreeze to enter the cylinder (Where it is not meant to be).

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If white smoke is present, check to see if the proper amount of antifreeze is inside the radiator and the overflow bottle. Also check to see if antifreeze has contaminated the engine oil. You can look at the engine oil dipstick, or look at the under side of the engine oil filler cap. If the oil is contaminated with antifreeze, it will have the appearance of a chocolate milkshake. Do not start the engine if the oil is contaminated with antifreeze, as serious internal engine damage can result.


How did antifreeze get in the oil or cylinder in the first place? The engine probably overheated and a head gasket failed due to excessive heat, thus allowing antifreeze to enter the cylinder (Where it is not meant to be).

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You could check next time to have to add coolant by starting the engine and then just sit and watch it for a few minutes to see if / where the coolant is coming out.

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I hope this helps - if not please give any further details and ask again. Thanks.

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