Quote:
skate said:
Went to add a little oil yesterday and when I removed the oil filler cap was surprised to find yellow slunge on inside of cap and filler spout. I live in wet climate but is this normal? My 996 C4S is a 2003 with 19,000 km on it, should I be concerned? I use Mobil 0-40 oil.



The sludge shows that there is some water in the oil. Whilst it could mean that a leaking gasket is allowing water to get into the oil, it is much more likely to mean that you have been making a lot of short trips, so that water condensation has collected in the crankcase.

Don't worry about it. Just go for a long drive. It'll do your car some good - and do you a lot of good.