Can someone tell me what this crap is on the inside of my oil cap? (Thick pasty white looking sludge)

 

Hi,

Often in the winter you will see this if you do not give the truck time to run and burn that off. I.e. - short commutes. It happens to me since I no longer drive to school and my work currently is 4 miles one way to my house. It can also be due to coolant leaking into oil IIRC, however this usually is the winter sludge from the truck not burning that off.

 

Truck guy is right. Check the dipstick and if the oil looks like chocolate milk then you have coolant leaking into oil. If not then the white gooo is from blowby and moisture due to burning gasoline. Hence the steam out tail pipe when cold. You should let the oil heat up all the way before shutting the engine off. And just because the coolant temp shows you that the engine is warm doesn't always mean the oil is. Usually about 15-20 min of operating temp is when that stuff really starts to boil out

 

Normal, -due to short trips. Hasn't had enough time to burn off.

Just go for a 40 mile drive or so on the e-way. You'll be good for awhile. When the weather warms up, it won't happen. UNLESS you have another problem, but I doubt it.

 

mine looks the same every winter. 6 mile commute is the issue. water emulsification. normal.

 

So do I need to use a motor flush next time I change the oil?

 

No just take a 15-20 mile trip once a week to boil off all the condensation