The 2017 Acura RLX 3.5L V6 achieves a combined fuel economy of 23 MPG, an acceptable figure for its target buyer. The RLX isn’t trying to be a fuel-sipping hybrid; it’s a comfortable, technologically advanced sedan primarily aimed at professionals who value relaxed cruising over performance. Fuel efficiency is a consideration, but not the primary deciding factor. These buyers prioritize a quiet cabin, a smooth ride, and Acura’s reliable reputation. They are willing to accept middling fuel economy as a trade-off for these qualities.

City and highway performance

The EPA estimates the 2017 Acura RLX at 20 MPG in the city and 30 MPG on the highway. The city figure reflects the reality of stop-and-go traffic where the direct-injected 3.5L V6’s efficiency is hampered by frequent acceleration and idling. The six-speed automatic transmission, while smooth and reliable, does not offer the fuel-saving advantages of the newer eight, nine, or ten-speed units found in some competitors. But, out on the open road, the RLX’s highway MPG demonstrates its capability as a comfortable long-distance cruiser. The engine settles into a relaxed hum, allowing drivers to cover ground with reasonable fuel consumption. The Variable Cylinder Management (VCM) system deactivates cylinders under light loads and also contributes to fuel savings on the highway. VCM is not a replacement for efficient engineering like you might see in newer RLX models. Check out RLX MPG across all years to see how the vehicle has progressed.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2017 Acura RLX 3.5L at $2,500. This figure is calculated based on 15,000 miles of driving per year, using the EPA’s combined MPG estimate and the national average fuel price at the time of calculation. It’s a useful benchmark for comparing the running costs of different vehicles, but individual expenses will vary depending on driving habits and location. Drive more aggressively, and that number could rise. Spend most of your time on the highway and it could fall. Gas prices can impact this figure considerably. While $2,500 may seem high compared to hybrid or compact cars, it’s within the realm of acceptability for a V6-powered luxury sedan.

Real-world expectations

While EPA estimates provide a standardized benchmark, real-world fuel economy often deviates from official figures. Expect to see figures slightly below the EPA estimates in the 2017 Acura RLX, especially if your driving consists primarily of short trips or heavy city traffic. Consistent highway driving should bring you closer to the 30 MPG mark. Owners who prioritize fuel efficiency and adopt purposeful driving habits can potentially exceed the EPA estimates, but it requires a disciplined approach. It’s wise to consult online forums and owner reviews for anecdotal evidence of real-world MPG figures from other RLX drivers to get a picture of what to expect.

How it compares

The 2017 Acura RLX’s fuel economy places it in the middle of its competitive set. For example, the Lexus ES 350, also equipped with a V6 engine, achieves an EPA-estimated 24 MPG combined, slightly edging out the RLX. The Buick LaCrosse with its V6 boasts a similar 25 MPG combined. On the other hand, the Mercedes-Benz E300, with its turbocharged four-cylinder engine, achieves a significantly better 25 MPG combined and 32 MPG on the highway. These comparisons matter to the RLX buyer because they are often cross-shopping these models and are aware of the tradeoffs between engine size, performance, and fuel efficiency. While the Acura’s fuel economy might not be class-leading, it delivers adequate performance. Before making a decision, check out all Acura fuel economy data to understand their range.

Tips to maximize efficiency

Gentle acceleration is key. The RLX’s V6 engine delivers ample power, but aggressive acceleration wastes fuel. Practice smooth acceleration to minimize fuel consumption, especially from a stop. Anticipate traffic flow to avoid unnecessary braking and acceleration.

Maintain a steady highway speed. The RLX’s VCM system is most effective when cruising at a constant speed on the highway. Avoid speeding or frequent changes in speed to maximize fuel efficiency. Using cruise control on relatively flat stretches of highway can further optimize fuel consumption.

Ensure proper tire inflation. Underinflated tires increase rolling resistance, leading to reduced fuel economy. Check your tire pressure regularly and inflate them to the recommended level, typically found on a sticker inside the driver’s side doorjamb. A tire pressure monitoring system (TPMS) will alert you to significant pressure drops.

Avoid unnecessary idling. Letting the engine idle consumes fuel. If you anticipate being stopped for more than a minute, turn off the engine. Modern engines are designed to be restarted frequently without causing damage.

Keep up with scheduled maintenance. Regular maintenance, including oil changes, air filter replacements, and spark plug replacements, ensures that the engine runs efficiently. Neglecting maintenance can lead to decreased fuel economy and potential engine problems.