is it better to run a different wieght oil for the winter season. And if so what would be the best for a turbo car?

 

It certainly would not apply to you being that you are in Ca.

But in the colder climates as per weights, I've heard and seen 0-30 used for extreme cold.

I have some in Mobil-1 Synthetic that I'm thinking of using this winter, haven't decided yet though. NY only gets so cold But, it is for my baby.

Good luck,

A.