The 2018 Lexus NX 300 AWD gets 24 MPG combined, which is acceptable for a stylish and comfortable compact crossover that focuses on luxury and all-weather capability. It won’t win any hypermiling contests, but the target market often includes affluent suburbanites who prioritize reputation, reliability, and a touch of style, so the fuel bill isn’t a primary concern. They are buying into the Lexus ownership experience, which involves certain trade-offs.

City and highway performance

The NX 300’s EPA ratings are 22 MPG in the city and 28 MPG on the highway. The city figure reflects urban driving’s stop-and-go nature, where the turbocharged 2.0L engine is frequently used to accelerate from a standstill. The engine’s boost to deliver its 235 horsepower contributes to the lower city MPG. The highway number is more palatable, as the engine can cruise at a constant speed, but it’s still not class-leading. While the six-speed automatic transmission is smooth, transmissions with eight or nine speeds often improve fuel economy and acceleration. Expect the NX 300 to deliver its best fuel efficiency on longer highway journeys at moderate speeds.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Lexus NX 300 AWD at $2,400. This is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway. National average fuel prices are also assumed. Individual fuel costs will vary depending on local gas prices and driving habits, but this provides a useful benchmark for comparing the NX 300 to other vehicles. Understanding all Lexus fuel economy data helps put this cost into perspective for the brand.

Real-world expectations

The EPA provides a standardized testing procedure, but real-world fuel economy often differs. Drivers with a heavy foot, those frequently driving in congested traffic, or those who live in hilly areas can expect numbers below the EPA estimates. Other drivers who prioritize efficiency and practice smooth acceleration and braking may achieve slightly better results. Consistent maintenance, including proper tire inflation and regular oil changes, also plays a role in maximizing fuel economy. The NX 300 requires premium gasoline, increasing overall running costs.

How it compares

The 2018 Lexus NX 300 AWD sits in the middle of its competitors. The Acura RDX with its 2.0T engine achieves 23 MPG combined, which is slightly less efficient. The BMW X3 xDrive30i is rated at 24 MPG combined, the same as the NX 300. The Audi Q5 2.0T comes in slightly better at 25 MPG combined. The NX 300’s hybrid variant, the NX 300h, gets an impressive 31 MPG combined, making it a more efficient option for those prioritizing less gas. Analyzing NX MPG across all years reveals a consistent story: the hybrid consistently outperforms the gasoline-only models. The buyer choosing the gasoline NX 300 is often less concerned with outright efficiency and more interested in the Lexus brand, its reliability, and the specific features or styling of the non-hybrid model.

Tips to maximize efficiency

Pay close attention to your driving style. The NX 300’s turbocharged engine responds significantly to throttle input, so avoid aggressive acceleration and braking. Smooth and gradual inputs will keep the turbocharger from constantly spooling up and consuming excessive fuel.

Use the “Eco” driving mode, but understand its limitations. This mode remaps the throttle response and adjusts the climate control system to prioritize fuel efficiency. It can make the car feel slightly sluggish, but it’s a worthwhile compromise for everyday commuting. Don’t expect miracles; a sensible driving style is far more effective than simply relying on Eco mode.

Ensure your tires are properly inflated. Low tire pressure increases rolling resistance, which directly impacts fuel economy. Check your tire pressure regularly and maintain it at the recommended level, which can be found on a sticker inside the driver’s side doorjamb.

Minimize excess weight. Carrying unnecessary cargo adds to the vehicle’s overall weight, forcing the engine to work harder and consume more fuel. Remove any items you don’t need from the trunk and passenger compartment.

Plan your routes strategically. Choose routes that minimize stop-and-go traffic whenever possible. Avoiding congestion will save you time and improve your fuel economy by reducing the frequency of acceleration and braking.