WTF is that?

 

WTH...Peanut Butter?

 

Condensation. Too many short drives maybe?
Get the motor to make some heat for a while and that will go away.

Shoe

 

dip stick looks OK?

 

That would make sense. I do a lot of short drives since work is only like 2 miles from my home. During winter, engine didn't even had the time to reach operating temp completely sometimes.

Dipstick and oil looked OK, I noticed that in the oil cap yesterday while doing my oil change.

 

Probly just some condensation. If you do alot of short trips or dont give enough time to burn off any moisture it may leave that goo stuff.

 

wow that is a first, I would drain your oil Immediately and see if any comes out of the oil tank. If it does look in the oil tank, if not pull your valve cover.

 

Do you use any additives?

 

I went back in the garage to look at the oil cap again. It's mostly gone so the condensation would make sense since I did a 50 miles trip after changing the oil yesterday.

I never used any additives, it was my 5th oil change on the car (I'm at 30 000 km and I change the oil every 6000 km)

1st oil change at 6000km: dealer used Royal Purple 5w20 since I wanted synthetic oil
2nd oil change at 12000km: Did it myself, Mobil 1 EP 5w30
3rd oil change at 18000km: Myself, Pennzoil Platinum 5w20
4th oil change at 24000km: Myself, Pennzoil Platinum 5w20
5th oil change at 30000km: Myself, Pennzoil Platinum 5w20 (yesterday)

The oil that got out of the engine yesterday looked just fine, dirty, but nothing weird.