The 2016 Lexus IS 300 AWD with its 3.5L V6 engine gets 21 MPG combined. Let’s be clear: it’s not a Prius, and buyers aren’t expecting hybrid-like fuel efficiency. Instead, they want a stylish, comfortable sedan with all-weather traction and decent performance. The fuel economy isn’t the best, but many are willing to compromise for everything else the car offers. Remember this is a sporty, all-wheel-drive vehicle before criticizing the gas mileage.

City and highway performance

EPA estimates for the 2016 Lexus IS 300 AWD are 19 MPG in the city and 26 MPG on the highway. The city number reflects the demands of stop-and-go traffic, frequent acceleration, and idling. The V6 engine, while smooth and responsive, needs more gas to accelerate the IS 300 from a stop. On the open road, 26 MPG shows that the six-speed automatic allows the engine to settle into a more efficient speed. How often and hard you accelerate will greatly affect your actual MPG on the highway.

The difference between city and highway mileage indicates that longer commutes with steady speeds will deliver better fuel economy than primarily short, urban trips.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2016 Lexus IS 300 AWD at $2,750. This is based on driving 15,000 miles per year using the national average fuel price. Of course, your fuel costs will depend on your driving, the fuel you use, and gas prices in your area. Aggressive driving, frequent short trips, and using premium fuel (which some owners prefer, although not required) will increase your expenses.

Careful driving and longer highway trips can lower that number, but $2,750 is a good benchmark, and it will fluctuate based on the fuel grades you use.

Real-world expectations

While the EPA estimates provide a baseline, actual fuel economy often varies. Experience shows that many IS 300 AWD drivers will see figures slightly below the EPA’s 21 MPG combined rating, especially with mostly city driving. Others who spend more time on the highway, drive conservatively, and keep up with maintenance may see results closer to or even slightly above the EPA estimates.

Factors like tire pressure, ambient temperature, and air conditioning can affect fuel consumption. Your mileage may vary, so track your own numbers to better understand your individual fuel costs. You can also view IS MPG across all years to compare.

How it compares

The 2016 Lexus IS 300 AWD’s fuel economy isn’t the best in its class. The BMW 328i xDrive from the same year, with its 2.0L turbocharged four-cylinder engine, gets better fuel economy, around 26 MPG combined. The Audi A4 Quattro, similarly equipped with a 2.0L turbo, does better than the IS 300’s MPG too. And the Infiniti Q50 AWD with its optional 3.0L turbo V6 (introduced later in the model year) can rival the IS 300’s numbers.

However, those who favor the smooth power and sound of a naturally aspirated V6 might find the Lexus’ trade-off acceptable, overlooking the few MPG they sacrifice for that silky drivetrain. These buyers may also want to view all Lexus fuel economy data for comparison.

Tips to Maximize Efficiency

Avoid excessive idling. The IS 300’s V6 consumes fuel even when stopped. If you expect to be stopped for more than a minute, turn off the engine. Modern starters are designed for frequent use, and restarting the car consumes less fuel than idling for a long time.

Keep tires properly inflated. Underinflated tires increase rolling resistance, making the engine work harder and using more fuel. Check your tire pressures regularly and inflate them to the levels on the driver’s side doorjamb. This can improve fuel economy.

Drive smoothly and avoid aggressive acceleration. The IS 300’s all-wheel-drive system gives excellent traction, but hard launches and frequent bursts of speed will quickly use up your fuel. Anticipate traffic, maintain a steady pace, and accelerate gradually.

Use the “Eco” driving mode when possible. The IS 300 offers driving modes that change the engine and transmission. Eco mode prioritizes fuel efficiency by reducing throttle response and optimizing shift points. It is good for everyday driving when maximum performance isn’t needed.

Follow recommended maintenance. Spark plugs, air filters, and engine oil are important for the IS 300’s efficiency. Follow the schedule to keep these items in good condition and the engine running well.