First off, I live in one of the coldest climates in the continental Unites States. I try to use my block heater whenever possible. However, my vehcile still experiences many cold starts below zero in the dead of winter. What is my best option for prolonging the life of my engine? Should I just go with a premium dino with a good pour point? I believe Penzoil has the lowest pour point of the dino oils at -44F. A dino oil would lose its good cold cranking ability quickly in extreme cold, right?? What should I do??