Is the Lexus IS250 good on fuel?

The Lexus IS250 offers respectable fuel economy for a midsize luxury sedan with a V6 from its era, typically delivering efficiency in the low-to-mid 20s combined and higher mileage on highways depending on drivetrain and year.

In this article we examine how the IS250 performs in real-world fuel economy, what factors influence its numbers, and how it stacks up against peers. We’ll also share practical tips for maximizing efficiency and what to consider if fuel economy is a priority for you when buying or owning an IS250.

What affects its fuel economy?

Several factors determine the IS250’s actual mpg, and they can swing numbers noticeably from one trip to the next. Understanding these elements helps set realistic expectations for daily driving.

• Drivetrain: rear-wheel drive (RWD) vs all-wheel drive (AWD) configurations typically yield different efficiency, with RWD usually edging out AWD in mpg.


• Model year and condition: older examples with higher mileage or signs of wear may not achieve the same efficiency as well-maintained units.


• Tire type and pressure: low-rolling-resistance tires and properly inflated tires help maximize mpg, while non-Economy tires or underinflation hurts economy.


• Driving style and environment: frequent hard acceleration, stop-and-go city driving, and heavy loads reduce mpg; steady highway cruising and light loads improve it.

These factors collectively explain why two identical IS250s can show noticeably different fuel economy in everyday use. Use the numbers below as a ballpark guide, not a guarantee.

Typical fuel economy ranges by configuration

The ranges below reflect common, real-world results reported by owners and reviewers for the IS250. Exact EPA figures vary by year and market, so consult the specific model year ratings for precise data.

• Rear-wheel-drive IS250 (model years roughly 2006–2013): about 18–22 mpg in city driving, 26–31 mpg on the highway, for a typical combined around 21–25 mpg.


• All-wheel-drive IS250 (model years roughly 2006–2013): about 17–21 mpg in city driving, 24–28 mpg on the highway, for a typical combined around 20–24 mpg.

In everyday use, you’ll often see combined figures in the low 20s for most IS250s, with highway legs delivering the best mileage when you can maintain steady speeds and light throttle input.

Is it worth it for fuel economy compared to peers?

Compared with contemporary rivals in the luxury mid-size segment, the IS250’s fuel economy is competitive for its non-hybrid V6 class but not outstanding by modern standards. Cars from that era with 2.0–2.5L engines or turbocharged four-cylinders often offered similar or slightly better efficiency, while newer models and hybrids have since pushed overall mpg higher.

Real-world ownership experiences

Owners generally report that the IS250 is reasonable for daily driving, especially on highways, but city trips can feel less efficient due to its age and performance-oriented nature. Real-world mpg tends to land in the low 20s in mixed conditions, with highway figures higher when steady cruising is possible. Variability is common due to maintenance history, tire choice, and driving style.

Maximizing fuel economy in an IS250

To squeeze more miles per gallon from an IS250, consider the following practical steps. These are widely applicable tips for keeping any older V6 sedan as efficient as possible.

• Keep tires properly inflated to the manufacturer’s recommended pressure and maintain alignment to reduce rolling resistance and improve stability.


• Perform regular maintenance: timely oil changes, clean air filters, fresh spark plugs, and a healthy fuel system help maintain efficiency.


• Lighten the load: remove unnecessary weight and avoid keeping roof racks or carriers on when not in use, as added drag lowers mpg.


• Drive smoothly: anticipate traffic, accelerate gradually, and maintain steady speeds to minimize fuel-intensive bursts of power.


• Plan trips to combine errands and avoid excessive short trips that waste fuel while the engine is cold.


• Use the recommended fuel grade and keep the fuel system clean; improper fuel or deposits can reduce efficiency over time.

With consistent maintenance and mindful driving, you can typically approach the upper end of the ranges noted above, especially on longer highway trips.

Summary

The Lexus IS250 provides solid fuel economy for a luxury V6 sedan from its era, particularly on highway drives. Expect roughly 20–25 mpg combined in typical mixed use, with higher highway efficiency and somewhat lower city efficiency. If top-tier mpg is a priority, newer models with advanced engines or hybrid options offer greater efficiency, but within its class, the IS250 remains a respectable compromise between performance and economy. When shopping or owning an IS250, prioritize maintenance history, drivetrain condition, and tire choices to ensure you’re getting the best possible real-world fuel economy.

What is the common problem with Lexus IS250?

Common problems with the Lexus IS250 include carbon buildup in the direct injection engine, which can lead to misfires and rough idling, and issues with the plastic dashboard material fading or becoming sticky. Other reported problems include various check engine light codes, a clicking noise from the rear suspension, and potential moisture damage to the amplifier or other electrical components due to clogged AC drain tubes.
 
This video discusses common problems with the Lexus IS250 and IS350, including engine issues and plastic degradation: 50sLife with SondurenYouTube · Apr 9, 2023
Engine and drivetrain 

• Carbon buildup: This is a frequent issue, especially on second-generation models, due to the direct injection system and frequent idling. It can cause misfires, check engine lights, and rough idling. 
• Check engine light: Specific codes like P0751, P2714, P0894, or misfire codes (P0300-P0306) are reported, often related to the carbon buildup issue or other engine problems. 
• Transmission problems: Some drivers report transmission issues like slipping, which can be caused by a lack of fluid maintenance. 

Interior and electrical

• Sticky/aging dashboard: The plastic material on the dashboard can become sticky or fade over time, sometimes unresolved by recalls. 
• Moisture damage: Clogged AC drain tubes can lead to water leaking onto the carpet, and moisture can also get into the amplifier, causing it to malfunction. 
• Old infotainment system: The original infotainment system is often outdated, with common complaints about glitches, such as the radio randomly shutting off. 
• GPS and radio issues: Some owners have reported issues with the navigation system, sometimes fixable by a software or map disc update. 

Other issues

• Rear suspension noise: A clicking noise from the rear suspension has been reported by multiple owners. 
• Safety issues: Some specific model years have had safety recalls and investigations, including for airbag and steering components. 

You can watch this video for a detailed discussion of potential issues when buying a used Lexus IS250: 55sMiguel's GarageYouTube · Jan 19, 2018

Is the Lexus IS250 fuel efficient?

Overall average: 8.4ltr/100km. Long distance average: 7.2ltr/100km.

Does Lexus consume a lot of fuel?

As an industry leader in terms of innovating hybrid and electric vehicles, Lexus continues to set the standard for fuel economy among all luxury brands. At Metro Lexus, we're confident that you'll be able to find the fuel-efficient Lexus that's perfect for your lifestyle and driving needs.

What year Lexus is 250 to stay away from?

A: While the Lexus IS 250 is generally a reliable vehicle, the 2007 and 2008 model years are the ones you should avoid if possible. These two years have more reported issues compared to other model years, though they still perform better than the worst years of many other vehicle models.