My wife's Jeep Renegade has the 2.4L Multi Air and it also recommends nothing but 0W-20. I have yet to find anybody running a 5W-30 or higher in it with a oil analysis to back up the claim it causes no issue.
As much as I would like to play engineer on this, I am going to stick to the 0W-20 until it is out of warranty and go from there. Anybody can tell you to run something besides the 0W-20 and you will be fine, but I doubt anybody is going to be helping you pay for any out pocket costs in the event of a warranty denial.
Until somebody shows me a fluid recommendation chart from another country that says the non turbo multi airs can run anything higher than a 0W-20, I am not going down that route.