NO, not miles, don't need a 3k, 4500, 6k debate here. My thing is, I don't drive the Jeep much, at all, and normally I don’t change oil for 4500 miles or more depending on how I have been driving and yes I do use Synthetic.
So is there a certain time frame (months) that I should follow as well? I changed mine back in August sometime and have only put about 2k miles on the Jeep and that includes over 600 miles to Mississippi, couple of trips to the parents side of town at 50+ miles round trip, and a trip to River Rock at another 250 miles. With winter approaching there will be less mountain bike trips, less off road trips and our office will be moving to about a mile from my apartment so I will walk or ride the bike.