22 MPG combined is an acceptable, if unremarkable, figure for the 2018 Acura MDX AWD 3.5L. Buyers don’t purchase this vehicle primarily for its fuel efficiency. Instead, they prioritize its reputation for reliability, its comfortable and spacious interior, and its blend of luxury and practicality. Mileage is a consideration, certainly, but it’s balanced against the needs of growing families who require three rows of seating and the confidence of all-wheel drive.

City and highway performance

The MDX’s EPA estimates break down to 19 MPG in the city and 26 MPG on the highway. The city number reflects the realities of stop-and-go driving, where the 3.5L V6 has to work harder to get the MDX’s substantial weight moving. The highway figure is more encouraging, showcasing the benefits of the nine-speed automatic transmission that helps to keep the engine in its most efficient range at cruising speeds. Highway mileage is where drivers see the biggest benefit from the MDX’s variable cylinder management (VCM) system, which deactivates cylinders under light load to conserve fuel. This is crucial, given that many MDX owners will be counting on the vehicle to perform well on long road trips.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,650 for the 2018 Acura MDX AWD 3.5L. This figure is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway, using national average fuel prices. Your actual fuel costs may vary based on your driving habits and the prevailing price of gasoline in your area. Aggressive driving and consistent use of premium fuel can increase this cost, while a focus on smooth acceleration and careful route planning can help keep it closer to the EPA estimate. For more information you can view MDX MPG across all years to compare model years.

Real-world expectations

While the EPA estimates provide a useful benchmark, real-world fuel economy can vary. The MDX is sensitive to driving style; lead-footed drivers will likely see numbers closer to the city estimate, even on the highway. Those who prioritize smooth acceleration, maintain a steady speed, and avoid unnecessary braking will likely find themselves closer to the EPA’s combined figure, or even exceeding it under ideal conditions. Heavy loads, such as hauling passengers and cargo, can also measurably impact fuel economy. The MDX’s real-world mileage is acceptable amongst its luxury SUV competitors, and is often perceived as fair compensation for its overall driving enjoyment and strong reliability record.

How it compares

In the competitive world of luxury SUVs, the 2018 Acura MDX AWD 3.5L’s fuel economy sits squarely in the middle of the pack. The Lexus RX 350 AWD, a frequent competitor to the MDX, achieves a similar 22 MPG combined. The Volvo XC90 T6 AWD, with its turbocharged and supercharged engine, gets a combined 21 MPG. The Audi Q7, another premium SUV, also tends toward the 20-22 MPG range in combined driving. The MDX shines in its reputation for above-average reliability, a factor that often outweighs a minor MPG deficit for many buyers. While hybrid models of some of these competitors offer significantly better fuel economy, they also come with a higher initial price tag. You can view all Acura fuel economy data on our website.

Tips to maximize efficiency

Take advantage of the MDX’s “Econ” mode. This setting adjusts throttle response and transmission shift points to prioritize fuel efficiency. While it may slightly reduce responsiveness, it can make a noticeable difference in fuel consumption, especially during city driving. The Econ mode encourages a more relaxed driving style that is more aligned with fuel saving driving habits.

Monitor your tire pressure regularly. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Consult the sticker on your driver’s side door frame for the recommended tire pressure for your MDX, and check the pressure at least once a month, or before any long trip. Using the correct tire pressure not only boosts MPG but will also help prevent premature wear and extend tire life.

Avoid unnecessary idling. If you anticipate being stopped for more than a minute or two, turn off the engine. Modern engines are designed to restart easily, and you will waste less fuel than letting the engine idle. This is particularly important in urban environments where traffic congestion is common.

Use cruise control on the highway to maintain a consistent speed. This reduces unnecessary acceleration and deceleration, which can significantly improve fuel economy. However, be mindful of traffic conditions and be prepared to disengage cruise control when necessary. Maintaining a consistent speed allows VCM to activate more frequently and reduces wasteful energy expenditure.