What is the best oil for a....

[davidleo]

325ix

I have heard everything from

Exxon 15 - 50? to Royal Purple 15 - 40 Any recomindations?

[Adrian_Visser]

not 5w30. Seriously though any decent brand of oil in the right viscosity (20w50 ish) is gunna be good. There are proly a thousand different opinions on what is best though.

[EA8]

Depends also on the weather of your state ... If it gets cold (-35 ish) like here in Iowa, I would just run 5W-30 in the winters and switch to 20W-50 as suggested by Adrian_Visser in the summer. cheers