0w pumps better than 5w when cold. Same operating viscosity, so the only difference really is cold starts. If you dive deep into the depths of bobistheoilguy forums and articles, you'll find that most argue that 0w-30 is a "better" oil than a 5w-30. Since I live in an area that sees lots of cold mornings, I just go with h 0w-30.Hey @sorich, why the 0W30 Oil?