Is Lexus IS 350 good on gas?
The Lexus IS 350 is reasonably efficient for a premium V6 sedan, but it isn’t the most fuel-sparing car in its class. In recent models, you’ll typically see mpg in the mid-20s overall, with highway figures nudging into the upper 20s to low 30s and city driving lower. Drivetrain and model year matter, with rear-wheel drive usually edging out all-wheel drive for better mileage.
Fuel economy by drivetrain
The following ranges reflect EPA estimates and common real-world results for recent IS 350 configurations. Values can vary by year, trim, wheel size, and driving style.
- Recent IS 350 with rear-wheel drive (3.5L V6, 8-speed automatic): typically around 20–22 mpg city and 28–32 mpg highway, with a combined around 25–26 mpg.
- Recent IS 350 with all-wheel drive: typically around 19–21 mpg city and 27–30 mpg highway, with a combined around 23–25 mpg.
- Older generations (pre-2020): similar ballpark, though aggressive driving or large wheels can push mpg lower and highway mpg can rise with gentle cruising.
In everyday use, highway cruising and steady speeds yield the best mileage. City stop-and-go traffic, quick bursts of acceleration, and heavier options (like larger wheels) tend to reduce mpg.
Performance vs. efficiency
The IS 350’s 3.5-liter V6 delivers strong acceleration and a refined feel, which comes at the cost of higher fuel consumption than four-cylinder rivals and some hybrid options. If fuel economy is a higher priority than outright performance, Lexus offers alternatives in its broader lineup, such as engines with smaller displacement or other model lines that emphasize efficiency more strongly.
How driving style affects fuel economy
Driver behavior has a meaningful impact on real-world mpg. Smooth acceleration, steady speeds, and minimal aggressive braking help maximize efficiency. Air conditioning use, cargo load, and tire pressure also play a role in overall fuel economy.
Real-world driving and efficiency tips
Gas mileage is not solely determined by the engine. Practical tips can help you get closer to the EPA estimates and improve everyday efficiency.
- Keep tires inflated to the manufacturer’s recommended pressure; underinflated tires hurt fuel economy.
- Use a gentle, steady throttle and anticipate stops to minimize brake usage.
- Utilize Eco or Normal driving modes if available, avoiding sport modes for daily commuting to conserve fuel.
- Regular maintenance (air filters, spark plugs, oil changes) helps maintain optimal engine efficiency.
- Minimize unnecessary weight and rooftop cargo, which can decrease efficiency, especially on the highway.
For buyers prioritizing fuel economy, the IS line offers a refined sports sedan experience, but MPG is typically lower than many non-premium compact sedans or dedicated hybrid models in the broader Lexus lineup.
What to consider when shopping
If mpg is a primary consideration, you’ll want to compare the IS 350’s efficiency with other Lexus options and with related models in the brand’s lineup. The IS 300 (with a smaller 2.0L turbocharged engine) generally delivers better city efficiency, while hybrid models in Lexus’ broader SUV lineup (like NX 450h+ or RX hybrids) offer higher overall mpg in daily driving, though they are different body styles and price points.
Bottom line: the IS 350 is a solid, refined choice among premium sedans, but it won’t match the most fuel-efficient cars in its class. If gas mileage is a defining factor, consider the IS 300 for better efficiency or look to Lexus hybrids and crossovers for higher mpg on longer trips.
Summary
The Lexus IS 350 offers respectable fuel economy for a premium V6 sedan, with typical combined mileage in the mid-20s and highway efficiency that can reach the low-to-mid 30s in favorable conditions. Drivetrain choice and driving style have a noticeable impact on real-world results. For the best possible mpg within the Lexus family, compare IS 350 figures against the IS 300 and the brand’s hybrid-equipped models across its broader lineup.
