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What is the gas mileage on a Lexus RX450h?

The Lexus RX450h, a hybrid luxury SUV, offers impressive fuel efficiency compared to its traditional gasoline-powered counterparts. According to the latest data, the Lexus RX450h can achieve an average of 31 miles per gallon (mpg) in the city and 28 mpg on the highway, resulting in a combined fuel economy of 30 mpg.


Understanding the Lexus RX450h's Hybrid Powertrain


The Lexus RX450h is powered by a hybrid system that combines a 3.5-liter V6 gasoline engine with two electric motors. This setup allows the vehicle to seamlessly switch between the gasoline engine, electric motors, or a combination of both, depending on driving conditions and power demands. The hybrid system's advanced technology and efficient energy management contribute to the RX450h's impressive fuel economy.


Factors Affecting Fuel Efficiency


Several factors can influence the actual fuel efficiency of the Lexus RX450h, including:



  • Driving Conditions: Driving in stop-and-go traffic, hilly terrain, or extreme temperatures can impact the vehicle's fuel economy.

  • Driving Habits: Aggressive acceleration, high-speed driving, and frequent braking can reduce the RX450h's fuel efficiency.

  • Maintenance: Proper maintenance, such as regular tire rotations, oil changes, and air filter replacements, can help maintain the vehicle's optimal fuel efficiency.

  • Accessories and Load: The use of roof racks, towing, or carrying heavy loads can increase the vehicle's energy consumption and decrease fuel economy.


It's important to note that the EPA-estimated fuel economy figures are based on standardized testing procedures and may not reflect the real-world performance of the Lexus RX450h in all driving conditions.


Maximizing Fuel Efficiency


To get the most out of the Lexus RX450h's fuel efficiency, drivers can employ the following strategies:



  • Driving Habits: Practice smooth acceleration, maintain a consistent speed, and avoid sudden braking to maximize the hybrid system's efficiency.

  • Regenerative Braking: Utilize the RX450h's regenerative braking system, which captures energy during deceleration and stores it in the battery, helping to recharge the hybrid system.

  • Eco Mode: Engage the RX450h's Eco mode, which optimizes the hybrid system's performance for maximum fuel efficiency.

  • Maintenance: Regularly maintain the vehicle, including tire pressure checks, oil changes, and air filter replacements, to ensure optimal performance and fuel economy.


By understanding the Lexus RX450h's hybrid powertrain and following these fuel-efficient driving and maintenance practices, owners can maximize the vehicle's impressive gas mileage and enjoy the benefits of its eco-friendly performance.

How many miles can a Lexus RX 450h last?


The Lexus RX 450h has an average lifespan of 183,589 miles or about 15.7 years. The RX 450h's predicted lifespan is derived from over 300 million data points iSeeCars analyzed to determine this model's average lifespan.



What is the best mpg Lexus hybrid?


The Lexus ES 300h sedan is the undisputed champion when it comes to fuel efficiency in the 2025 Lexus hybrid lineup. This mid-size luxury sedan combines a 2.5-liter four-cylinder gasoline engine with an electric motor, resulting in an impressive EPA-estimated combined fuel economy rating of 44 MPG.



What are the common faults on a Lexus RX450h?


Suspension problems are also common in the Lexus RX450h, particularly in models that have high mileage. Some owners have reported leaks in the air suspension system, while others have reported that the compressor wears out quickly and needs to be replaced.



How long does a Lexus 450h hybrid battery last?


15 years
Under average driving conditions, you'll need a hybrid car battery replacement roughly once every 150,000 miles or 15 years, whichever comes first.



What is the real mpg of the Lexus RX450h?


Based on data from 19 vehicles, 1,505 fuel-ups and 507,105 miles of driving, the 2021 Lexus RX450h gets a combined Avg MPG of 28.47 with a 0.26 MPG margin of error.



What happens if you accidentally put 87 instead of 91 in a Lexus?


Use of unleaded gasoline with an octane rating lower than what is listed for your model year vehicle could potentially result in engine knocking. If the octane rating used is less than required, damage to the engine may occur and which could void the vehicle warranty.



What is the best mpg lexus hybrid?


The Lexus ES 300h sedan is the undisputed champion when it comes to fuel efficiency in the 2025 Lexus hybrid lineup. This mid-size luxury sedan combines a 2.5-liter four-cylinder gasoline engine with an electric motor, resulting in an impressive EPA-estimated combined fuel economy rating of 44 MPG.



What is the best year to buy a Lexus 450h?


The 2022 Lexus RX 450h is our top pick for the best model year value for the RX 450h. With the 2022, you would only pay, on average, 71% of the price as new, with 83% of the vehicle's useful life remaining.



How many miles per gallon does a Lexus 450h hybrid get?


2024 Lexus RX Hybrid MPG
Below, you'll find the Lexus RX Hybrid MPG estimates for each of the models: Lexus RX 350h AWD: 37 city / 34 highway / 36 combined* Lexus RX 500h AWD: 27 city / 28 highway / 27 combined* Lexus RX 450h+ AWD: 83 MPGe**



Does the Lexus RX450h hybrid require premium gas?


You can put premium gas in your Lexus RX, and it can provide better performance, but it's not a requirement. Any gas that's put in your Lexus RX shouldn't be higher than 15% ethanol. If gasoline at the pump has more than 15% ethanol, or it's labeled as a flex-fuel, it shouldn't be used in your RX.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.