I found tan color sludge in my oil, isn't that due to a water leak?

Asked by Feb 26, 2014 at 08:14 PM about the 2001 Buick Century Custom

Question type: Maintenance & Repair

Tan Sludge in oil, I found after I removed my oil cap.

2 Answers


If you are just looking under your oil cap on the top of the engine, that is a common thing. It's when you drain your oil into an oil pan and it looks like a vanilla smoothie. That's when you worry. That's just a little moisture from starting and stopping.


That is residual moisture build up in the engine. This will sometimes happen when the PCV system is not working properly in the engine. Locate the PCV valve and replace it and clean out the coffee milk shake residue on the cap. It will take care of your problem. Good Luck

Your Answer

Add photo

Related Questions

Search Buick Century Questions

Buick Century Experts

#1 John Saffrahn
John Saffrahn
Reputation 870
#2 Tom Demyan
Tom Demyan
Reputation 730
#3 John Pate
John Pate
Reputation 400
View All

Related Models For Sale

Used Buick LeSabre
11 Great Deals out of 2,340 listings starting at $1,795
Used Buick Regal
123 Great Deals out of 10,948 listings starting at $1,850
Used Chevrolet Impala
793 Great Deals out of 34,401 listings starting at $799
Used Buick Park Avenue
511 listings starting at $1,400
Used Honda Accord
812 Great Deals out of 81,611 listings starting at $899
Used Toyota Camry
1,096 Great Deals out of 96,274 listings starting at $1,250
Used Nissan Altima
1,079 Great Deals out of 82,567 listings starting at $670
Used Ford Taurus
253 Great Deals out of 20,518 listings starting at $1,500
Used Chevrolet Malibu
1,008 Great Deals out of 85,694 listings starting at $1,995
Used Honda Civic
668 Great Deals out of 77,418 listings starting at $1,000