The oil you by over the counter at a Dodge/Jeep dealer is currently made by Pennzoil, so that is the best guess as what they use at the factory.
5W30 is factory recommended
5w20
I use 15w40
A 2014 Dodge Charger will use 5W20 oil. This oil can be purchased at any auto parts store.
10w30
Use 10w30 in a 1995 Dodge Dakota.
5w30
Yes
It shouldn't use any between oil changes.
Factory plug is 13mm.
Factory recommends 5w-30 grade oil.