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Brown gunk on the dipstick S90-V90 1997

This problem has been around for a while. A brown foam forms around the dipstick and I have been changing the oil every few months to keep things going along. One guess is that there is coolant getting into the oil, but I have also heard that short drives where the engine doesnt get all that warm will also cause the problem. My drive to work is about 5 miles and although the engine comes up to temperature, it can't be getting all that warm in such a short distance. Car currently has over 180k miles on it and nothing major has ever been done to the engine. Any ideas as to what is happening here?
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97 S90 with 178K miles still going strong






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New Brown gunk on the dipstick [S90-V90][1997]
posted by  eviltwin  on Sun Jan 23 04:12 CST 2005 >


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