oil residue

5

Asked by May 02, 2015 at 01:18 PM about the 1998 Volkswagen Beetle 2 Dr STD Hatchback

Question type: Maintenance & Repair

when I pull oil filler cap off theres milky residue on the cap and around the rim it doesn't go down in the pan just residue at top

3 Answers

That's emulsion. A mix or water and oil (yes, they do actually mix) and usually a result of many short trips, like a few block and shut off, then home again. Running the car on the highway for 20-30 miles at least once a week will eliminate this, as long as your dipstick has clean oil. If you do a lot of highway driving, and still have that emulsion you might have another problem. It looks like this? Or like that but not as bad? click image

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Could also be the result of a clogged PCV (Positive Crankcase Ventilation) system. Check the PCV valve and hoses. Make sure they're not clogged, damaged or misrouted. HTH. -Jim

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