I'm going from the owners manual, they call for 5W20 only, no other options. If you go to the Mobil site and plug in the info they suggest 0W20 and 5W20, no 30 grade oils. IIRC Amsoil is the only company that suggests either a 20 or a 30 grade oil. I know both will work, but the 30 is not spec'd by the mfg.
Correction M1 5W30 does not meet the Chrysler spec, but the 0w30 does. Confusing since Chrylser offers no other choices in viscosity for the 08-10 3.7L engine.