Originally Posted By: DBMaster
I had a small container of the used oil in my freezer for a few days. I maintain the temperature at 0F which I have never seen in this area in forty years. Obviously, it thickened up a bit from ambient temperature, but it still flowed quite easily down a sheet metal plate onto which I dribbled it.
Thanks for doing that. I wonder how it might have compared to new fresh oil. The fact that it flowed well is a good sign the VII chemicals were still intact after that many mega-miles. Interesting. (I keep my freezer at 0F too, shows right on the door in digital numbers.) 0F is a typical cold weather startup in Colorado, even colder sometimes, but hits it for the usual case here.
I gotta say, its surprising your results were that good. We hear about chemicals oxidizing, degrading, breaking molecular polymer chains, ketones forming, varnish, really altering oil as you drive.