* Engine: The 2008 Rubicon came with a 4.0L inline-6 engine.
* Driving conditions: City driving will yield significantly lower MPG than highway driving. Off-roading will drastically reduce fuel economy.
* Tire size: Larger tires negatively impact fuel economy.
* Vehicle maintenance: Proper maintenance (like properly inflated tires and a well-tuned engine) improves fuel efficiency.
* Driving style: Aggressive driving reduces fuel economy.
Expected MPG: While you won't find a single definitive number, expect to see EPA estimates in the range of 13-16 mpg combined (city and highway). Real-world mileage will often be lower, especially with off-road use. Highway driving might get closer to the higher end of that range, while city driving and off-roading will likely be considerably lower.
