18 MPG combined isn’t going to win any efficiency awards, but for the 2015 Toyota 4Runner 4WD with the 4.0L V6, it’s simply part of the deal. This isn’t a vehicle purchased for its sipping habits. It’s chosen for its rugged durability, off-road chops, and legendary Toyota reliability. Buyers know what they’re getting into. They prioritize capability over economy and are willing to accept the consequences at the pump.

City and highway performance

The EPA estimates for the 2015 4Runner 4WD break down to 17 MPG in the city and 21 MPG on the highway. These figures reflect the realities of a vehicle designed to tackle more than just paved roads. The V6 engine, paired with a five-speed automatic transmission and a full-time four-wheel-drive system, contributes to the lower numbers. Stop-and-go city driving taxes any vehicle’s fuel consumption, and the 4Runner, with its weight and less-than-aerodynamic profile, is no exception. Even on the highway, the 4Runner prioritizes stability and towing capacity over aerodynamic efficiency. The older five-speed automatic also impacts efficiency on the open road. It’s a reliable unit, but more modern transmissions with additional gears would improve highway MPG.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,450 for the 2015 Toyota 4Runner 4WD 4.0L V6. This figure is based on driving 15,000 miles per year and using national average fuel prices. It’s a helpful benchmark to consider, but remember that your personal driving habits and local fuel costs can significantly alter that number. Shorter trips, frequent idling, and aggressive driving will all drive up your fuel expenses beyond this estimate. Likewise, those who drive fewer miles than average will spend less.

Real-world expectations

While the EPA provides standardized testing results, real-world fuel economy can vary. Owners of the 2015 4Runner 4WD often report figures that align fairly closely with the EPA estimates, but again, lifestyle heavily impacts these numbers. Those who frequently use the 4Runner for off-road adventures or towing will undoubtedly see lower MPG readings than those who primarily use it for commuting. The aggressive tires often fitted to these models also contribute to a fuel economy penalty. Remember to reference 4RUNNER MPG across all years for more information.

How it compares

Compared to other SUVs in its class, the 2015 4Runner 4WD’s fuel economy is squarely in the middle to lower end. For example, the Jeep Grand Cherokee 4×4 with the 3.6L V6 offered better EPA figures, with some trims achieving around 19 MPG combined. Even the V8 models in the Grand Cherokee range weren’t far off the 4Runner’s MPG. The Nissan Xterra, a direct competitor at the time, also achieved slightly better economy, rated at 17/22 MPG city/highway in 4×4 configuration. The difference matters less to 4Runner fans who value long-term reliability and off-road capability. Some other less capable SUVs like the Ford Explorer achieved far greater efficiencies, however, it doesn’t offer the same trailering and offroading capabilities. For access to all Toyota fuel economy data, view our other content.

Tips to maximize efficiency

While the 4Runner isn’t known for its stellar fuel economy, there are steps you can take to improve your MPG. Ensure your tires are properly inflated to the recommended pressure, as underinflated tires increase rolling resistance and reduce efficiency. Consider switching to a less aggressive all-terrain tire if you mostly drive on pavement.

Avoid unnecessary idling. Modern engines don’t need to warm up for extended periods, and idling wastes fuel. If you anticipate being stationary for more than a minute, turn off the engine.

Service the vehicle regularly. Scheduled maintenance, including oil changes and air filter replacements, helps ensure the engine runs efficiently. A clean air filter allows for optimal airflow, while fresh oil reduces friction.

Drive conservatively. Avoid rapid acceleration and hard braking, as these habits consume more fuel. Maintain a steady speed on the highway, and anticipate traffic flow to minimize unnecessary speed changes.

Consider less frequent use of 4-wheel-drive. While beneficial when needing to traverse challenging terrain, the vehicle will achieve marginally better fuel economy when left in 2-wheel-drive. Ensure to never use 4-wheel-drive on hard surfaces as this will damage the drivetrain.