The 2012 Wranglers called for 5w30 on the oil fill cap and in the owners manual. Starting in 2013, they switched it to 5w20. I've heard of people asking about this and getting a response from Chrysler that either is fine. 5w20 is thinner than 5w30, so some people suggest the switch to thinner oil may have been to slightly improve efficiency.
Owners manual states that the oil capacity is exactly 6 qts. The turbo would slightly increase the oil capacity because the lower end of the turbo's oil drain hose is below the oil level in the oil pan, but it's not enough to worry about.
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