Weird Engine Oil Fill happenings???

1999 jeep grand cherokee...
what is this weird stuff in the Engine Oil Fill on the cap and down into the fill...
http://pergatory.net/en/MVC-017F.JPG
http://pergatory.net/en/MVC-018F.JPG
http://pergatory.net/en/MVC-019F.JPG
http://pergatory.net/en/MVC-020F.JPG

This is what they call oil diution, it's caused by cold weather 7 short trips,where the engine doesn't get warmed up & actually sweats 7 vaporizes the oil Dale [email protected]

Hi the 7 that is in my answer are actually & they should be ands dale