I've been running the Mobil 1 in a Dana 44 equipped crew cab pickup since 05. It weighs almost a ton more than the Jeep and runs loaded up a lot, absolutely no problems. I don't think you'll have a problem.
The warranty thing is funny. Whats the dealership going to do, taste test it? Whatever you put in there turns black within a couple days and looks/smells like rank used oil. Probably going to have metal shavings and hunks of gear in it if you actually need the warranty, too.