i did a search and got nothing, so herre it is. I changed my oil (mobil 1)(98 e320 4matic 120k) 2 times ago and there was a film on the back of the oil cap. white, cake batter like crude. So i cleaned it off and changed oil. now 2 weeks (4k miles later) ago I change it again and the back of the cap is about 3 inches thich covered in what looks like pancake batter. there was quite a bit of it, way more than last time, so I clean it off, put some engine flush stuff in and run for 10 minutes then drain and refill with synthetic. I am told this is from water, or condensation getting in the oil, or from a bad gasket. i do sometimes smell antifreeze in the cabin with defroster on, by only rarely. also heard that short trips like my 2 miles to work will cause this. What is going on here ?