The proper oil depends on the climate & temperatures you're operating in the vehicle in.
Based on the owner's manual, 10w30 is the preferred oil, 5w30 is acceptable in temperatures ranging from -30*c to 30*c, 10w30 for temps from -20*c to 30*c and for temperatures exceeding 30*c, 10w40 or 10w50 - take your pick.
I'm in the tropics - we're >30 most days (it's 31.3 in the shade today), I run a 10w40.