I'm not an expert in capilary motion. That's interesting though. Have you figured out what it is? Better question--can I put regular (5W30) in my motor after I've put in synthetic? Someone tld me I shouldn't do that.
Yes I think that's true because 4 deg C is the most dense that H20 gets. I don't understand what you mean about higher temperatures sucking oxygen out of the atmosphere though. How does that work?
To create heat takes oxygen.