Re: 1st oil change on 2012 wk2 ????
I follow the manufacturer's schedule. Who do you think has more to lose, us or the folks selling these vehicles? The dealer is going to tell you 3K miles, and it may appear to be "free" but they're being paid by Chrysler to perform the service. Also, the piston rings and other parts of the engine rely on the friction of the oil to break in and seat properly. If you change the oil too quickly, you jeopardize inhibiting this process. This is why manufacturers don't recommend switching to synthetic oil until after the first service (or even the 2nd).
With that being said, no matter what you do I'm sure you're safe. I'm sure changing the oil every 1K miles won't hurt anything. As long as you feel good with how your Jeep is getting treated, that's all that matters!