diegoo.jayjay

Okay, so today I was due for my oil 5500 Miles.
On I go with my usual: Open the Fumoto valve and start draining. Once it slows down, I open the oil cap. Thats where all the worry begins. I remove the cap and immediately see all the white gunk, but only on the top of the cap and the thread..

I take the oil jug and empty it out. Perfectly clean oil. Remove the filter. Clean oil. Open the coolant and it smells like coolant. Check dip stick. Clean stick.

What the f*** is going on?

My only theory.

As you may have seen in the news California has been dumped with snow, ice, rain the past two weeks. The first week I spent the weekend in BigBear. 2Feet of snow covering the truck. This last weekend I left my truck out in the rain and hit a different mountain. (approximately 1 foot of snow on my truck.) Can it be that moisture made its way to the cap and mixed with the oil there and stayed there?

Im going to run the new oil for about 3000 and get an OA. I believe my truck is out of warranty.

Truck INFO: 2013 Ecoboost. 4x4. 75,000 Miles. (yes 75K) Stock everything else.

N3UP

Oil analysis is the only way to be certain, but cold and damp conditions and short drives can create condensation.
I've seen it numerous times here in PA.

If the only place it's showing up is on the cap it's probably weather related.

diegoo.jayjay

As I figured. Probably didn't help that I only drove the truck for like 2 miles before I changed the oil.

robertsunrus

Hi, moisture in the air /crankcase steamed up to the cap area. If no signs anywhere else, clean the cap and don't worry too much about it. A real problem would show up in the oil or coolant. You could also do a block test.

santa06

In the north with the deep freeze winters we always get the white gunk on the oil cap.

Welcome to our world ; doesn't seem to have any negative effects on engine life.
This is why there are more frequent oil changes on the extreme service schedule.

diegoo.jayjay

Sounds good you guys thanks!

M0RRIS

I've owned a couple vehicles that had signs of condensation in the oil cap area.

Before you get into all the tests for blown head gaskets, consider what others said. Short trips and condensation. When you determine that all is good, go for a nice long rip. Highway speeds will burn off the condensation.

Sirikenewtron

Yup pretty common as others have said in cold climate and short trips. I'm in Tahoe most of the winter and I get it also.

Tothemax

Like other have said, normal. Condensation due to cold temps and lack of driving long distances.