28 MPG combined is not a headline-grabbing fuel economy figure, but for the 2018 Acura RLX Hybrid, it’s a crucial part of the car’s appeal. This is a full-size luxury sedan, typically purchased by individuals who prioritize comfort, technology, and a smooth driving experience. They appreciate the efficiency, especially since it doesn’t reduce the refined, quiet performance delivered by the hybrid powertrain.

City and highway performance

The RLX Hybrid performs well in urban environments, matching its combined MPG of 28 with the same rating in the city cycle. This is where hybrid technology truly excels, using regenerative braking and electric assist to minimize fuel consumption during stop-and-go driving. The 29 MPG highway figure is surprisingly close to the city number, suggesting the hybrid system continues to improve efficiency even at higher speeds, likely through optimized engine management and electric motor assistance during cruising.

Annual fuel cost

According to EPA estimates, the 2018 Acura RLX Hybrid will cost $2,050 per year to fuel. This figure is based on driving 15,000 miles annually and using national average fuel prices. Remember that this is just an estimate; your actual fuel costs will vary depending on your driving habits, the type of fuel you purchase, and local fuel prices. Drivers in areas with higher gas prices will naturally see a higher annual fuel cost than those in regions with cheaper fuel.

Real-world expectations

While the EPA ratings offer a standardized benchmark, real-world fuel economy can vary. Factors like driving style, traffic conditions, and even tire pressure can influence your MPG. Owners who prioritize smooth acceleration and anticipate traffic flow will likely achieve figures closer to the EPA estimates. Aggressive driving, frequent hard acceleration, and prolonged idling can significantly decrease fuel efficiency.

Keeping up with scheduled maintenance, including tire rotations and keeping your tires properly inflated, will also help optimize fuel economy.

How it compares

The Lexus GS 450h, a direct competitor to the RLX Hybrid, has a combined MPG of 31. While that difference might seem small, it adds up over time. The BMW 530e plug-in hybrid, in contrast, achieves a combined rating of 67 MPGe (miles per gallon equivalent), offering significantly better fuel economy in electric mode, but its gasoline engine is rated at just 27 MPG combined. The Infiniti Q50 Hybrid manages 29 MPG combined. For RLX buyers, the Acura’s efficiency is a bonus on top of its comfort and distinctive styling.

Tips to maximize efficiency

The RLX Hybrid’s intelligent multi-mode drive system allows for efficient cruising in electric mode when the conditions are right; try to anticipate traffic and coast whenever possible to increase the time spent in EV mode, especially at lower speeds. Use the available driver selectable modes; “ECON” mode will remap throttle response and shift points, encouraging more efficient driving habits.

Minimize your use of accessories that place a heavy load on the electrical system, such as climate control, especially during short trips; the engine may have to run solely to provide power to these systems, reducing the benefit of electric-only propulsion. Ensure your tires are properly inflated to the recommended pressure. Underinflated tires increase rolling resistance, which reduces fuel economy. Refer to the sticker on your driver’s side doorjamb for the correct tire pressure.

Avoid aggressive driving habits, such as rapid acceleration and hard braking. Smooth, gentle acceleration and anticipating traffic conditions to avoid unnecessary braking will help conserve fuel. The RLX Hybrid uses regenerative braking to recapture energy during deceleration; using a light, steady pressure on the brake pedal will maximize the amount of energy that is recovered, further increasing fuel economy.

Consider reducing the amount of weight you carry in your vehicle. Excess weight can negatively impact fuel economy, especially in city driving, where the engine has to work harder to accelerate. Regular maintenance, including oil changes and air filter replacements, will help keep your RLX Hybrid running efficiently. Dirty oil and clogged air filters can reduce engine performance and fuel economy. You can find all Acura fuel economy data on our website. To research RLX MPG across all years, view our model data.