Generally, expect:
* 2-door models: Around 15-17 mpg city and 18-20 mpg highway. Some variations may be slightly higher or lower.
* 4-door (Unlimited) models: Slightly lower than 2-door models, often in the range of 14-16 mpg city and 17-19 mpg highway.
These are just estimates. The actual mileage you get will depend on many factors. For the most accurate information, check the EPA's FuelEconomy.gov website and search for the specific 2009 Jeep Wrangler trim level (e.g., Sport, Sahara, Rubicon, and whether it's a 2-door or 4-door).