I run Castrol GTX conventional in every thing i have driven. was doing the 3000 mile oil and filter change schedule, and the oil looked like it did when i put it in.. went to 5000 miles and have been doing that for years and have had no trouble out of any of my rides...other than the nagigator acting up from time to time hope she dont see that ha ha

I started using royal purple in mine last year and noticed it takes a lot longer for my change oil light to come on.

I'm doing what everyone else is doing, filter every 3,000, oil every 6,000. I just changed my diff fluid today at almost 40,000 probably waited a bit long.

Hell I put like 1000 miles on it last year and the last time the oil got changed was May 2010 and before that it must have been at least a year. I feel bad about it now!

I have never been able to do this in my jk, I have been having to add a quart every 1500 miles or so since the thing was brand new.

With the advance in dino oil technology (and synthetic), plus better filters, and more efficient motors, changing oil at 3000 is throwing money away for the sake of "feeling" like you are doing the right thing. That is very old school and no longer applies unless you are running your rig ragged or doing The Hammers each week.

My 2011 suggests changing the oil at 8000 miles and that is the conservative and safe "cover their butt" OEM manual recommendation. Why on earth would Chrysler make that recommendation if it wasn't safe for their warranty? Think about it for a sec.

Ponder this. If you run synthetic, which of course has a much narrower bell curve distribution of perfect lubrication than dino oil, then you can safely go the full distance (read your manual, mine says 8000) without a filter change, especially if you are using a premium filter.

I ran Amsoil in my 97 TJ and it was good for 38000 miles with a recommended filter change at the halfway point. When I would drain the oil, it still looked the color of honey. That's my 2 cents, but as always...YMMV

i use mobile 5000 and a mopar oil filter every 5000 miles (rotate my tires every 5k too). cost under $20 at walmart

Call me old school, but i like the 3000 mile oil changes. I do them myself so i save a few bucks. It also allows me the time to look at everything from belts , hoses , etc. When im underneath , i like to check u-joints, wire routings, etc. Just more peace of mind for me. The thing about this topic that is great is that you know oil changes are very important. When i was working at the shop, a guy towed in a very nice 4 wheel drive Bronco with about 75000 miles on it. Turned out that the motor locked up. This guy Never changed his oil. Still had the oem filter on it that we had to pry off. Cost him over 3000 dollars for a junkyard motor plus labor. I guess it was easier for him to shell out 3 grand as compared to 30 bucks here and there for an oil change.

You really don't have to change either for 7k on modern quality oils. Mobil 1 is designed for 15k when thier filter is used and amzoil is for 24k or 25k. Something like that. Either way you are throwing away good oil and filters at 3k miles. if you prefer indifferent brand just keep an eye on it. When the oil is both dark and starting to thin change it.