2008 Rubicon 4dr.
I had my oil changed at 14k
The shop also checked my front/rear axel fluid and it was HORRIBLE.
The guy said it is common with Wranglers and not to drive with it that bad, he was honest and right. I went down the pit with him and my fluid was way beyond needing change.
My jeep is a daily driver and never trail driven yet too.
Nothing but work and back.
FYI to all