The 4.10's in the Rub are just going to be too much for me to overcome to get better mileage. At some point I'll have a go at the Borla exhaust and see what happens. For time time being I'll just endure :D
I have a stock (except for high flow air filter in the factory air box) 2004 Rubicon automatic and I get right around 14-15.5 no matter if it's city or highway.
I wish I could get a squeak more mileage out of it. 16-17 and I'd be happy.