21 MPG combined isn’t going to win any awards, but it’s the price for the 2020 Lexus IS 350 AWD. This isn’t a car for hypermilers; it’s for drivers who appreciate a naturally aspirated V6 and the sure-footedness of all-wheel drive in a compact luxury package. Buyers accept this fuel economy because they prioritize the car’s smooth power delivery, well-known Lexus reliability, and a driving experience that, while not overtly sporty, is certainly engaging.

City and highway performance

The EPA estimates the 2020 Lexus IS 350 AWD will achieve 19 MPG in the city and 26 MPG on the highway. These figures reflect the demands placed on the 3.5L V6 and all-wheel-drive system under different driving conditions. City driving, with its stop-and-go traffic and frequent acceleration, taxes fuel economy. Highway driving, with consistent speeds, allows the engine to operate more efficiently, but the AWD system still contributes to some drag. The six-speed automatic transmission, while smooth and responsive, lacks the fuel-saving potential of the eight- or ten-speed transmissions found in some competitor vehicles. Many IS 350 owners find the transmission to be a good match for the engine’s power delivery, however, so they are willing to accept the trade-off in MPG.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 Lexus IS 350 AWD at $2,750. This figure is based on driving 15,000 miles per year and using national average fuel prices. Actual fuel costs will vary depending on individual driving habits, local fuel prices, and the type of fuel used. Drivers who primarily drive in the city, or who have a lead foot, can expect to exceed this estimate. Drivers who do primarily highway driving and practice fuel-efficient driving techniques might see lower annual fuel costs. The $2,750 figure provides a benchmark for potential owners to consider when budgeting for vehicle ownership.

Real-world expectations

While the EPA estimates offer a standardized comparison point, real-world fuel economy can vary. Many IS 350 AWD owners report MPG figures that are close to the EPA estimates, but individual experiences will differ. Factors that affect real-world MPG include driving style, weather conditions, tire pressure, and the type of terrain. Aggressive acceleration, frequent braking, and sustained high speeds will all reduce fuel economy. IS MPG across all years can provide more insight into the variability that drivers have experienced.

How it compares

The 2020 Lexus IS 350 AWD’s fuel economy stacks up against its competitors in interesting ways. The BMW 330i xDrive, for example, gets an EPA-estimated 25 MPG combined from its turbocharged four-cylinder engine. The Audi A4 quattro achieves a similar 27 MPG combined. These German sedans offer better fuel economy, but their turbocharged engines deliver power in a different manner than the IS 350’s smooth, naturally aspirated V6. On the other hand, the Acura TLX SH-AWD with the V6 offers similar performance and all-wheel drive but achieves around 23 MPG combined, a slight edge over the Lexus. For buyers prioritizing fuel economy within this segment, exploring all Lexus fuel economy data and competitor models is important. The IS 350 AWD customer is often less concerned with outright fuel efficiency and more with reliability, the V6 engine, and the overall Lexus ownership experience.

Tips to maximize efficiency

Smooth and steady acceleration will significantly improve fuel economy. Avoid sudden bursts of speed and try to maintain a consistent pace. The IS 350’s V6 rewards a measured approach, and you’ll see the benefits at the pump.

Proper tire inflation plays a vital role in fuel efficiency. Check tire pressure regularly and maintain the recommended pressure, which is typically found on a sticker inside the driver’s side doorjamb. Underinflated tires increase rolling resistance and reduce MPG by as much as 3%.

Reduce unnecessary weight in the vehicle. Carrying extra cargo adds to the vehicle’s overall weight and reduces fuel economy. Remove any unnecessary items from the trunk and passenger compartment.

Minimize idling. Letting the engine idle for extended periods wastes fuel. If you anticipate being stopped for more than a minute, turn off the engine. Modern engines do not require a long warm-up period, so you can usually start driving immediately.

Plan your routes to avoid traffic congestion. Stop-and-go traffic significantly reduces fuel economy. Use navigation apps to identify and avoid congested areas, opting for routes with more consistent speeds.