The 2015 Ram 1500 2WD with the 3.0L V6 EcoDiesel gets 23 MPG combined, a figure that is much better than other trucks in its class and still good almost ten years later. This isn’t a gas-guzzling pickup. This Ram 1500 was purchased by those who need real truck capability but want something more efficient than a V8 and are willing to pay more to get it.

City and highway performance

Breaking down the 23 MPG combined figure shows the Ram 1500 EcoDiesel’s good and bad points. In the city, it gets an EPA-estimated 20 MPG. Stop-and-go traffic isn’t good for this truck, the weight and inefficiencies of an internal combustion engine reduce fuel economy. However, on the open road, the Ram 1500 2WD EcoDiesel is great, achieving 27 MPG on the highway. The 8-speed automatic transmission is important here, it lets the engine cruise at low RPMs, saving fuel as it covers long distances.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,400 for the 2015 Ram 1500 2WD EcoDiesel. This is based on driving 15,000 miles per year and using national average fuel prices. Fuel costs will vary based on driving and local fuel prices, but the $2,400 is a good estimate for potential fuel expenses.

Real-world expectations

While the EPA estimates help with comparisons, real-world fuel economy can change. Drivers who often tow heavy loads or drive aggressively will likely see lower numbers than the EPA estimates. On the other hand, careful drivers who care about fuel efficiency and stick to highway driving may exceed the 27 MPG highway figure. Consider your driving patterns to have realistic expectations.

How it compares

The fuel economy of the 2015 Ram 1500 2WD EcoDiesel makes it different from many similar trucks. Consider the gasoline-powered V8 options from the same year. The 2015 Ford F-150 with the 5.0L V8, for example, gets around 17 MPG combined in 2WD configuration. Even the V6 gasoline F-150 struggles to match the Ram’s fuel economy. The Chevrolet Silverado 1500 and GMC Sierra 1500 with their 5.3L V8s are also less efficient. Toyota did not offer a diesel Tundra in 2015, but their gasoline models usually get worse mileage than the diesel Ram. Buyers who want the best fuel efficiency in a full-size truck may like the 2015 Ram 1500 2WD EcoDiesel, which is why the “eco” version cost more for so long.

Tips to maximize efficiency

Gentle acceleration and smooth braking are essential for maximizing fuel economy in any vehicle, especially a truck. Avoid aggressive starts and sudden stops, because these waste fuel. Use cruise control on the highway to maintain a constant speed and prevent unnecessary acceleration, helping the Ram 1500 2WD EcoDiesel stay in its most efficient operating range and use less gas.

Make sure your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure often and inflate them to the recommended pressure listed on the sticker inside the driver’s side door. Tire pressure can change with temperature, so adjust accordingly. For more information on all Ram fuel economy data, see our brand page.

Regular maintenance is critical for optimal fuel efficiency. Make sure your engine is properly tuned and that all maintenance, like oil changes and filter replacements, are done on schedule. A well-maintained engine runs better and consumes less fuel, helping you get the most out of your 2015 Ram 1500. Remember to check the 1500 MPG across all years to see how this model year stacks up.

Reduce unnecessary weight. Carrying extra weight in your truck bed or cabin reduces fuel economy. Remove anything you don’t need, like tools, equipment, or other cargo. A lighter truck needs less energy to accelerate and maintain speed, resulting in better fuel efficiency. Also, be aware of the additional weight of larger tires if you choose to go that route.