2002 dodge dakota 2wD 4.7 auto 130xxx miles

2002 dodge dakota questions just got this truck and wanted to change oil asap. well when i finnally got to doing the oil change i noticed that the oil filler neck along with the the oil cap had a milkshake like film no them. now the 1st thing that entered my mind was head gasket can someone please tell me its something eles other than that. now the truck runs fine and it has never overheated or showed any signs of abnormal behavior other than very loud fan noise witch autozone told me was normal for this vehicle. please someone get back to me on this matter it would be very much appreciated.:screwy:

Do you know if the truck was mainly driven for short trips? Short trips don't allow the engine to warm up enough to burn off condensation so it builds up in the crankcase. That would be one possibility. Another could be a leaking intake gasket allowing antifreeze into the oil. Does it use antifreeze?

That's really common with the filler neck design. If you real curios pull a valve cover and look for sludge build up

sorry it took so long to get back alot of ot @ work and just busy busy anyway if anyone wants to still help me the things i have done is replace the tps,pcv,and the iac. still have milky oil in oil filler neck and on oil cap and i noticed i have a small oil leak on oil pan in the back i also found that every 5 to 6 weeks im filling the coolant overflow tank up but the truck never overheats and i think i dont know for sure but the evap control valve i think thats the name anyway its over by the battery it has a plug and a hose on each side of it maybe a inlet and outlet i think it was hooked up wrong because it has been installed upside down. when i looked at it the word top was on the bottom side