View original topic: Strange Discovery in the Oil
coolbugfan Thu Mar 30, 2023 9:18 pm

Hi Sambas,

I went to change the oil in my beetle today. (It's fuel injected if that makes a difference.)

Everything went as normal until I took off the oil fill cap. The inside of the cap and the top of the fill tube were coated in a weird light brown/beige creamy substance that looked like pudding or yogurt.

I wiped out as much as I could get using paper towels and then finished the oil change as normal. The car runs fine.

What is this stuff? Does it indicate a problem? If this was a water cooled engine, I'd be worried about oil and coolant mixing but there's no coolant here to mix.

I'm worried. Help appreciated.

Thanks, Sambas.

mukluk Thu Mar 30, 2023 9:46 pm

mikeonthebike Thu Mar 30, 2023 9:47 pm

Blown head gasket. That's water from the radiator getting into the oil.

No, really it's just condensation. Happens when driving the car not long enough to get warmed up.

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