Like the OP, I received a dozen "free" oil changes for my GC as part of the extended warranty package. Plus, the dealership gave me a coupon for the first oil change for free. So, last Saturday I took my V6 back to the original dealership for the first free change, I had 48xx miles on it at the time. The oil change indicator had been beeping at me since about 4xxx miles. Since I had a mix of city and highway driving, with at least 1500 miles of pure interstate driving, I felt comfortable with this change interval.
Anyway, back to the real topic. After the dealership did the oil change, I noticed that they had put one of those stupid reminder stickers on the inside of the windshield (which I always promptly remove and toss). When doing so, I noticed that they had indicated the next change due at - get this - 78xx miles, a 3k interval! So even a Jeep dealership doesn't pay any attention to the factory recommendations, they're out for the bucks just like a Jiffy Lube or Oil Can Henry!