Quote Originally Posted by matt5112 View Post
Your oil is supposed to get up to 212 but not get much higher than 220-230.

212 is where it burns off moisture.

230 is where breakdown begins.

Oil cools the motor as well as the coolant.
If you have a 180 tstat your oil will still reach temps needed to burn off moisture. 160s are another story... I've done some oil changes on a 160 car in the winter and it was definitely muddy.