The 2018 Acura RDX FWD 3.5L gets 23 MPG combined. It’s not particularly impressive for a compact crossover in 2018, but it’s the cost for the smooth, responsive V6 engine that defines the RDX experience. This isn’t a vehicle primarily purchased for hyper-miling; it’s for buyers who prioritize a refined driving experience and luxury features at a competitive price. Practicality matters, of course, but performance is part of the RDX’s mission.

City and highway performance

Breaking down the EPA estimates further, the RDX achieves 20 MPG in the city and 28 MPG on the highway. The city figure reflects the realities of stop-and-go traffic, where the V6 consumes more fuel than smaller, turbocharged engines favored by some competitors. The highway number is more respectable, showing the benefits of the RDX’s well-calibrated six-speed automatic transmission. It comfortably settles into a fuel-sipping cruise when the open road appears, but never feels caught out when you need to quickly pass or merge. The transmission is eager to downshift and provide the V6’s power when you need it.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,500 for the 2018 Acura RDX FWD 3.5L. This figure is based on driving 15,000 miles per year and using national average fuel prices at the time of testing. Keep in mind that your actual costs will vary depending on your driving style, local fuel prices, and the amount you drive. If you primarily drive short distances in the city and have a heavy foot, expect to spend more. If you mostly cruise on the highway and adopt a more fuel-conscious approach, you might spend less than the EPA estimate. However, $2,500 is a reasonable yardstick to use when budgeting for fuel expenses.

Real-world expectations

While EPA estimates provide a standardized benchmark, real-world MPG often differs. Owners of the 2018 Acura RDX typically report figures that align closely with the EPA estimates, perhaps a mile or two lower in combined driving. Aggressive acceleration will certainly impact fuel consumption. The six-speed automatic transmission, while smooth, is now a bit dated compared to the eight- and nine-speed units found in newer vehicles, which can further optimize fuel economy. The RDX’s weight, while not excessive, also contributes to fuel consumption, particularly in city driving.

How it compares

In the 2018 compact luxury crossover segment, the RDX’s fuel economy is noticeably less efficient than some of its rivals. For example, the 2018 BMW X3 sDrive30i (FWD, 2.0L Turbo) boasts a combined EPA rating of 25 MPG, offering a tangible advantage over the RDX. The Lexus NX 300h hybrid achieves an impressive 31 MPG combined, making it a far more fuel-efficient, if less performance-oriented, option. Even the Acura’s corporate cousin, the Honda CR-V with its available 1.5L turbo engine, manages around 30 MPG combined, a figure that might make some buyers question whether the RDX’s luxury and V6 power are worth the fuel penalty. But these buyers are after the extra refinement, the smooth six-cylinder engine, and the Acura nameplate. If you need to compare all Acura fuel economy data to make an informed decision we have all the numbers here.

Tips to maximize efficiency

A light foot on the accelerator makes a significant difference in the RDX. Avoid aggressive acceleration and try to maintain a steady speed, especially in city driving. The V6 is wonderfully responsive, but using all its power is a quick way to deplete the fuel tank. Keeping the windows up and using the air conditioning carefully can also help conserve fuel, particularly on the highway.

Regular maintenance is essential for optimal fuel economy. Ensure your RDX receives scheduled oil changes, tire rotations, and air filter replacements. A well-maintained engine runs more efficiently, contributing to better MPG. Proper tire inflation is also critical, as underinflated tires increase rolling resistance and reduce fuel economy.

Consider using cruise control on the highway to maintain a consistent speed and minimize unnecessary acceleration and braking. This will help the transmission settle into its most fuel-efficient gear and reduce fuel consumption. Anticipate traffic flow and avoid sudden braking whenever possible; coasting to a stop is always more efficient than hard braking.

Minimize idling. If you’re stopped for more than a minute, turn off the engine. Modern vehicles are designed to restart quickly and efficiently, and idling wastes fuel. This is especially important in city driving, where frequent stops at traffic lights and intersections can add up to significant idling time. Before you consider taking a look at RDX MPG across all years, you can still take small steps today.