Dodge Durango Gas Mileage Calculator

This calculator estimates the fuel economy of a Dodge Durango based on the distance traveled and the fuel used. You enter the miles driven and gallons of fuel consumed (or kilometers and liters), and it returns the average miles per gallon (MPG) or liters per 100 kilometers (L/100 km), along with the equivalent fuel cost per mile if you provide the price per gallon.

Formula

The core calculation is straightforward:

MPG = Distance (miles) ÷ Fuel used (gallons)

For metric units, the equivalent consumption figure is:

L/100 km = (Fuel used in liters × 100) ÷ Distance in kilometers

And to convert MPG to L/100 km, use the constant 235.215:

L/100 km = 235.215 ÷ MPG

Variables:

• d – distance traveled, in miles (or km)
• g – fuel used, in US gallons (or liters)
• p – fuel price per gallon, in dollars (optional)
• MPG – miles per gallon (US)
• L/100 km – liters per 100 kilometers

Note: US gallons differ from imperial gallons (1 US gal = 0.8327 imperial gal). This calculator uses US gallons, which is the standard for fuel economy ratings in the United States.

Worked Example

Using the default values: you drive 300 miles and use 20 gallons of fuel.

1. Divide distance by fuel: 300 ÷ 20 = 15 MPG.
2. Convert to L/100 km: 235.215 ÷ 15 = 15.68 L/100 km.
3. If gas costs $3.50 per gallon, cost per mile = 3.50 ÷ 15 = $0.23 per mile.

The calculator shows 15.0 MPG, 15.7 L/100 km, and $0.23 per mile.

Why the Durango’s Mileage Varies So Much

The Dodge Durango is a full-size SUV offered with several engines and drivetrains, and real-world fuel economy depends heavily on which one you have. The base V6 engine (3.6L Pentastar) is the most common and typically returns around 18–22 MPG on the highway and 14–17 MPG in the city. The V8 options—the 5.7L HEMI and the 6.4L SRT—consume significantly more, often dropping to 12–15 MPG combined. The supercharged 6.2L Hellcat version is even thirstier, with many owners reporting single-digit MPG under hard acceleration.

Other factors that affect real numbers:

• Drivetrain: All-wheel-drive (AWD) models weigh more and have more drivetrain drag, reducing MPG by 1–2 compared to rear-wheel-drive.
• Tires and wheels: Larger, wider tires and off-road tread increase rolling resistance.
• Roof racks and cargo boxes: These increase aerodynamic drag, especially at highway speeds.
• Driving style: Aggressive acceleration and high-speed cruising can cut fuel economy by 20–30%.

How to Use the Calculator Correctly

To get an accurate estimate for your specific vehicle, you need real data. The best method is to fill the tank completely, reset the trip odometer, drive normally until the tank is low, then fill it again and note the gallons pumped. Divide the trip miles by the gallons used. This “tank-to-tank� method is far more reliable than the dashboard’s instant readout.

If you only know your fuel consumption in liters per 100 km (common in Canada and Europe), you can convert it to MPG using the inverse: MPG = 235.215 ÷ L/100 km. The calculator’s second output does this automatically.

Common Mistakes to Avoid

• Using imperial gallons: If you’re in the UK or Canada, a gallon is different. Always use US gallons for MPG calculations.
• Mixing units: Entering kilometers with gallons will give nonsense. Keep distance and fuel in the same system.
• Relying on the trip computer: The dashboard display can be optimistic by 1–2 MPG. Manual calculation is more trustworthy.
• Calculating over too short a distance: A 10-mile trip can be skewed by traffic and cold starts. Use at least a full tank.

Comparing Durango Trims and Alternatives

If you’re shopping, the calculator helps you compare trims. For example, a 2021 Durango V6 RWD is rated at 19 city / 26 highway MPG, while the V8 AWD is rated at 14 city / 22 highway. The difference over 15,000 miles a year at $3.50/gal is roughly $350–$500 annually.

Alternatives to consider if fuel economy is a priority:

• Ford Explorer Hybrid – about 27 MPG combined
• Toyota Highlander Hybrid – about 36 MPG combined
• Kia Telluride – about 23 MPG combined (non-hybrid)
• Honda Pilot – about 22 MPG combined

None offer the Durango’s towing capacity (up to 8,700 lbs with the V8), so if you need to tow, the Durango’s thirst may be acceptable.

Real-World MPG: What Owners Report

Online owner forums and fuel-tracking apps show that real-world numbers often run 10–15% below EPA estimates. For the V6, many owners report 16–18 MPG in mixed driving, while highway cruising at 70–75 mph yields 22–24 MPG. The V8 typically delivers 13–15 MPG in the city and 19–21 on the highway. Towing a trailer can drop fuel economy to 8–10 MPG regardless of engine.

This calculator is a tool for your own measurements—not a substitute for official EPA ratings. Use it to track your vehicle’s health over time; a sudden drop of 3+ MPG could indicate a problem like a dirty air filter, underinflated tires, or a faulty oxygen sensor.

Frequently Asked Questions

How many gallons does a Durango hold?

Most Durango models have a 24.6-gallon fuel tank. With a V6 and highway driving, that gives a range of roughly 500–550 miles per tank. With the V8, expect 400–450 miles.

Does the Durango have cylinder deactivation?

Yes, the 5.7L HEMI V8 has a system that shuts down four cylinders under light load to save fuel. It can improve highway economy by 1–2 MPG, but it disengages when you accelerate or climb hills.

Why is my Durango’s MPG lower than the EPA rating?

EPA ratings are derived from lab tests with controlled conditions. Real-world factors like traffic, weather, cargo weight, and use of A/C reduce efficiency. Also, the EPA’s tests were updated in 2008 to be more realistic, but many drivers still see lower numbers.

Can I improve my Durango’s gas mileage?

Yes. Keep tires inflated to the recommended pressure, remove unnecessary weight, avoid aggressive acceleration, use cruise control on highways, and keep up with maintenance (air filters, spark plugs, oil changes). These can improve MPG by 5–10%.

Is the Durango’s fuel economy considered bad?

For a full-size SUV with V8 options, it’s average. The V6 is competitive with rivals like the Chevrolet Tahoe (which gets 15/20 MPG) and the Ford Expedition (17/24 MPG). The SRT and Hellcat versions are performance vehicles, so their low MPG is expected.

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in d | Distance traveled | miles | 300 | 0
in g | Fuel used | gallons | 20 | 0
in p | Fuel price per gallon | $ | 3.50 | 0
out mpg | Average fuel economy | MPG | d / g | 1
out lp100k | Fuel consumption | L/100km | 235.215 / (d / g) | 1
out cpm | Fuel cost per mile | $/mile | p / (d / g) | 2