* Make and Model: Different manufacturers and models have different engine sizes, transmissions, and aerodynamic designs, all impacting fuel economy.
* Engine Size and Type: Larger engines generally consume more fuel. Gas engines typically get better mileage than diesel, but this can vary.
* Driving Conditions: City driving yields significantly lower fuel economy than highway driving. Factors like speed, traffic, and terrain all play a role.
* Vehicle Load: A fully loaded van will get worse gas mileage than an empty one.
* Maintenance: Proper maintenance (tire pressure, tune-ups) improves fuel efficiency.
Therefore, there's no single answer. You'll likely see EPA estimates ranging from 10-15 mpg (miles per gallon) in city driving to 15-20 mpg on the highway. However, real-world mileage can be lower, especially with heavier loads and aggressive driving.
To find the fuel economy for a *specific* 15-passenger van model and year, you should consult the following resources:
* The vehicle's owner's manual: This will provide the manufacturer's estimated fuel economy.
* The EPA's FuelEconomy.gov website: This website allows you to search for fuel economy data based on make, model, and year.
* Used car listings: Many used car listings will include the fuel economy reported by the seller (though this may not always be accurate).
Keep in mind that these are estimates, and your actual mileage may vary.
