Just wondering if any of you have noticed a strange film on your dipstick. Here's the situation. My oil level is right near the top line when I check it cold, and it looks completely normal, but lately I've been noticing above that the dipstick has a film on it which one would expect. There probably is always a fine film of oil the whole length of the dipstick, but mine looks almost frosty, or kind of like it has oil emulsified in coolant or water. I've checked the oil cap and there is no milky appearance there, and I've kept an eye on the coolant level and it does not seem to be going down. Thinking back to when I checked the oil in warmer times, I don't remember seeing this so I'm wondering if it can be related to the cold weather or just what is causing it. Any ideas?