This morning it was very cold here in the 'burbs of Atlanta. The local airport reported 17º F which is very cold for our climate. In the name of science,, and because I'm a freakin' idiot, I pulled my old junker VW Rabbit into the garage after it sat outside all night and I got a clean drain pan and commenced to draining the 15W-40 Quaker State HDX that I put in during November. Let me tell you that even at a warm 17ºF this oil barely poured out of the sump. I removed the drain plug and the oil didn't even get on my fingers because it was so slow to pour. I was shocked to say the least. This did NOT reflect any of the indications that I've gotten from the freezer tests nor does it resemble the -20ºF pour point that the oil is supposed to have. Even in my old beater I'm going to stick with 5W's in the winter time and reserve the 15W's for spring/summer use.