What the heck is this yellow stuff??? - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums
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post #1 of 3 Old 01-27-2013, 09:00 PM Thread Starter
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What the heck is this yellow stuff???

I was checking my oil in my 2001 Dodge Durango that has a 4.7L engine today and i was a little low on oil. I took the oil cap off and seen all this yellow oily stuff sitting on the bottom of my oil cap. What the heck is this? Should I be concerned at all? I have never seen anything like it all my life.
I posted a pic of it.
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post #2 of 3 Old 01-28-2013, 02:46 AM
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It's condensation from the PCV being vented into the oil filler tube. Synthetic oil doesn't do it as bad. Not SUPPOSED to be harmful.
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post #3 of 3 Old 01-28-2013, 12:14 PM
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Same thing happens all the time in my truck. The oil fill cap gets coated in the sludge. Does not appear in the oil when I check it with the dipstick. It is just condensation from moisture building up.

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