I was cleaning the car at the weekend and happened to lift the oil cap and noticed that there is a layer of black gunge inside. it was quite thick.

I was just wonering is this normal for a car with a good service history which i'm assuming included oil changes?

Can i drain the oil and use something to dissolve and/or flush out the gunge.

 

What is gunge?

White reside means moisture. It's normal. Black sludge means sludge, which is not normal.

Put some Seafoam in the crankcase. Run the car to help clean all the oil passages and then change the oil and filter using an Audi OE replacement filter and full synthetic oil.

If it's a 1.8T, change the oil every 3K-5K miles, religiously. If it's a V6, 10K miles or once a year is ok, but 5K is a better interval if you are worried about dirty oil.

 

Thanks,

That is what i am going to do. i'm just glad it did not mean anything to nasty.

 

well sludge is nasty, that is if you dont take care of the problem soon...

 

http://en.wikipedia.org/wiki/Gunge

"Gunge is a British colloquial name for ‘‘slime’’ a term used in the US and other countries to define a runny substance similar to paint..."

We call it sludge here.

 

Doom da dooooom dooom. Ugh . If it's the 1.8 run the seafoam in there quick and change the oil man. Like stated above it will be a disaster if that gunge coils up under the bonnet .

 

OK Sludge it is...and SeaFoamed it will be...Thanks.