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 car with this problem as it was an indication of a failing head gasket. You advice will be very much appreciated.

Asked on 19 September 2011 by KB, via email

Answered by Honest John
Could be. Emulsified oil ‘mayonnaise’ can also be an indication that the car hasn't been used for a long time, or that it has been started from cold a few times just to move it and not been allowed to warm up properly.
Similar questions
Does a creamy substance on the oil cap indicate head gasket problems?
I changed the oil in my car, ran an engine flush, drained it and then put in new oil. However, now the oil has that awful emulsification - how did this happen? There was absolutely no emulsification in...
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...
Related models
Good-looking coupe that's packed with kit. Drives well, particularly the V6 model. All offer keen value.

Value my car

Save £75 on Warranty using code HJ75

with MotorEasy

Get a warranty quote

Save 12% on GAP Insurance

Use HJ21 to save on an ALA policy

See offer