Does a creamy substance on the oil cap indicate head gasket problems?

Does a creamy substance on the oil cap indicate head gasket problems?

What's the cause of white smoke and emulsion on the on the inside of the oil filler cap?

What is the cause of white exhaust smoke, even when the car is warm, from my 2008 Renault Modus 1.2 petrol with 32,000 miles on? There is also a small amount of emulsion inside the oil filler cap but no...

What is this creamy-coloured deposit around our Clio's oil filler?

There is a creamy coloured deposit in the oil filler of my wife's 2008 Clio 1.2TCE (26k miles). The water level and oil level are normal and the oil is a good colour. The car was serviced in December....

Go forth and emulsify

I have been looking at Hyundai Coupes around 2005 model 2 litre engine. Every car I have looked at has cream inside the oil filler cap. Is this normal? I was told many years ago never to buy a second hand...