Brake fluid question

I heard the Polaris brand DOT4 brake fluid is the only kind that should be used in the XP1000. Is this true? I am bleeding the brakes today and the only DOT4 brake fluid the shop had was Maxima and they said that will work for the RZR.

I am also going to change other fluids in my XP1000, and am wondering what is the BEST stuff to get. For coolant I’m thinking Engine Ice. Front/rear differential oils I’m thinking the specified type from Amsoil or Lucas oil. And engine oil I’m thinking Amsoil…
Let me know if these are good to use in the 1000, what would work better, or if the Polaris brand fluids are what I should use instead.