06 tacoma help

Ok first you dont put the oil directly into the main unit like normal because theres stuff in the way so theres a plastic funnel that comes up to make putting oil into it easier, well i have a yellow foam build up in the inside of the oil cap and in the funnel and alot of condensation and if you clean it it comes back quickly. But the foam is not in the oil at all and not on the dip stick. i brought it to the dealer and the tested the oil and there was no contaminets and marked the radiator fluid and none is leaking and the did a pressure test and it didnt loose a lb at all so theres not leaks. now what could be causing this?????? and second will the condensation hurt anything, the dealer said no?????????

That used to be a common problem in cars/trucks, I thought most newer engines run hot enough to prevent foam build up. Sounds like most of your driving may be on short trips. It may not hurt anything but I wouldn't want it in my engine. What type oil are you using and how often is it changed?

Clifton