yellow goo
 

I noticed the yellow goo underneath the oil cap over the weekend, I fall into the "short trips category" live in NE cold winter etc. I cleaned it all out best i could took it for a long drive Sunday. When i returned home pulled the cap again and everything looked as I expect it should. Called the dealer yesterday explained the situation and my concern regarding everything that has been stated on this site which has been extremely helpful. The service adviser told me not to worry and that if I did not exhibit any other issues, like exhaust issues white smoke, rough start etc i should be ok.. What should i do at get the oli changed at the very least right? Thanks for your help in advance..

I would do a couple quick, hot oil changes using OEM BMW oil and filters as well as look into the maintenance procedure for cleaning out the OSV at minimum.

Goo
 

A chocolate milk brown goo usually means water in the oil. Short run, cold temps can cause this but not uasually is any signifigant quantity. If that's the goo you got, an oil change is a must.

When you check the oil on the dipstick, you will be able to tell if it is dark brown/black, looking like dirty oil, or golden yellow, looking like clean oil. Either is normal. If it looks like the colour of malted milk, the chocolate brown that Diesel Dog refers to, then you likely have water in the oil.

If it is just the yellow paste under the filler cap, often called 'cheeze whiz' then it is from condensation. Doing one hot oil change should be good, given that you have no other symptoms.

Don't know what car you have, but you might want to seriously consider installing the updated parts especially if you are under warranty.

http://www.xoutpost.com/bmw-sav-foru...under-cpo.html

My personal experience is that I did not have any of the warning signs mentioned by your SA (off-color exhaust, rough starts/idles, loss of oil, etc) before my CCV failure and $2K-plus invoice from BMW for repairs. I wouldn't take the SA's word as a guarantee that nothing will go wrong.

What car do you have and what is your date of production?

05 X5 3.0

Have you installed the updated parts?