Thats weird for stock.. Has all maintenance been keep up on? I.E. Spark plugs, oil, axle fluids, trans fluids, greasings, air filter, tire pressure? Pretty sure manufacturer stats only put the mpg at 14 and 16.. They are not fuel smart vehicles, But before i lifter mine i was getting about 16 city 18 highway.
2001 WJ Limited 4.7 Powertech, Quadradrive, 2" BDS lift.
"If you can't get there in a Jeep, You should reconsider going there."