Originally Posted By: Gilitar
It specifically calls for Mobil 1 0w40 or synthetic 5w40 if Mobil 1 0w40 is unavailable.
And the oil cap on my Volvo R recommends Castrol. That doesn't mean I use it. Recognize cross-marketing arrangements and don't be a lemming.
Originally Posted By: Gilitar
I want an oil that I don't have to worry about the turbo cooking.
Then you should lean towards RL or another POE-heavy base oil. These will have the best thermal performance. Another oil is Motul 300v, but that is more of a track oil than RL in the weights you are looking at and is ugly expensive.
Before getting all in love with M1 0w-40, be aware that it routinely shears down into the lower 30s with higher pressure turbos unless you have a large sump capacity. Terry quietly revealed its test sequence trick a number of years ago here. A very fine oil that won't hurt you, but not without its warts.
Unless you're coming up north, I see no meaningful need for a 0w oil at your ambients, ever.
But if you must have a 0w oil, have you considered GC? While getting long in the tooth, it is just about a 40 and does NOT shear down. Still a robust, terrific oil.