Can I use 0w-40 oil in my car? 06 m35

[xxxalpinexxx80]

What's the best oil to use? Weight wise? I know mercedez n such reccomend 0w-40

I'm in massachusetts and it's summer time so the cold starts isnt really a worry, but is it bad that the 40w is thicker at operating temps?

What are the pros or cons using 0w-40 rather than 5w-30

Thinking about buying royal purple street performance 0w-40, or 5w-30.

I drive her hard and aggressively