Hy guys
I drive an R34 GTT actual i use Castrol 10w60. I hear its better to drive with 10w40 like motuls turbolight. I have no oilcooler installed engine is stock with nistune 340ps. Who drives 10w40 from motul with no oilcooler and how good is it, like oil pressure stability oil temp etc.
Thanks greets from Switzerland