Just bought a Mk2 8v GTi and it has mayonaise in the oil filler cap. What could this be? No blue smoke but the car has been sat around so maybe it just needs a bit of a long drive? Any ideas?
Could just be condensation if the car was only used for short trips (oil not getting hot enough). I`d do an oil and filter change and keep an eye on the coolant level, the oil cooers can fail letting the water and oil mix as well as the head gaskets failing.
If the car is otherwise running great then I certainly would not worry too much. As Keith says, an oil and filter change could cure it. I bought an 8V MK2 GTI at the beginning of this year, which had awful looking mayo under the oil cap. After an oil change, the car has been perfect for the last eight or nine months. The car originally had been used for short trips around a farm. I still find chicken feathers in it...
