The average fuel efficiency of a Jeep can vary significantly based on the specific model, engine, and drivetrain configuration. For instance, the Jeep Wrangler typically offers a fuel economy of around 20 to 25 miles per gallon in combined city and highway driving, depending on whether it has a standard gasoline engine or a more fuel-efficient hybrid variant. The Jeep Grand Cherokee, especially with its more powerful engine options, may range from about 18 to 24 miles per gallon, while the compact Jeep Compass usually provides better efficiency, averaging between 24 to 30 miles per gallon. The fuel efficiency can also depend on driving conditions, load, and maintenance. For the most accurate and updated information, it may be beneficial to check the specifications on the current Jeep website, which provides detailed insights into the fuel economy of each model.