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How big is the fuel tank on a Lexus GX 550?

The Lexus GX 550 has a fuel tank capacity of 23.0 gallons (87 liters). This large fuel tank allows the GX 550 to have an impressive driving range, making it a practical choice for long-distance travel or towing heavy loads.


Detailed Breakdown of the Lexus GX 550 Fuel Tank


The Lexus GX 550 is a full-size luxury SUV that is known for its off-road capabilities and spacious interior. One of the key features of this vehicle is its large fuel tank, which provides ample range and convenience for drivers.


According to the information gathered from various sources, the Lexus GX 550 has a fuel tank capacity of 23.0 gallons (87 liters). This sizable fuel tank allows the GX 550 to have a driving range of up to 500 miles (800 km) on a single tank of gas, depending on driving conditions and fuel efficiency.


The large fuel tank size is particularly beneficial for those who use the GX 550 for towing or off-road adventures, as it reduces the need for frequent refueling stops. Additionally, the fuel tank's capacity contributes to the overall versatility and practicality of the Lexus GX 550, making it a popular choice among SUV buyers.p>

Importance of Fuel Tank Capacity in SUVs


Fuel tank capacity is an important consideration for SUV buyers, as it directly impacts the vehicle's range and convenience. Larger fuel tanks, like the one found in the Lexus GX 550, offer several advantages:



  • Increased driving range: A larger fuel tank allows the vehicle to travel further on a single tank of gas, reducing the need for frequent refueling stops.

  • Improved towing and off-road capability: The additional fuel capacity is particularly beneficial for SUV owners who use their vehicles for towing or off-road adventures, as it provides more range and reduces the risk of running out of fuel in remote areas.

  • Enhanced convenience: With a larger fuel tank, SUV owners can spend less time at the gas station and more time enjoying their driving experience.


Overall, the Lexus GX 550's 23.0-gallon (87-liter) fuel tank capacity is a significant feature that contributes to the vehicle's versatility, practicality, and overall appeal among SUV buyers.

How big is the fuel tank on a 2025 Lexus GX 550?


Fuel tank capacity - 21.0gal.



Does the Lexus GX 550 require premium fuel?


Yes, the 2025 Lexus GX 550 requires premium 91-octane unleaded gas for optimal performance and to avoid a decrease in power and efficiency. While using lower-octane fuel might not cause immediate damage, Lexus recommends premium fuel to ensure the engine runs as intended and to prevent potential long-term issues. 

  • Performance: Premium fuel is needed to achieve the performance ratings for which the engine was designed. 
  • Potential issues with regular gas: Using regular gas could lead to a decrease in performance, fuel efficiency, and potentially cause engine knocking or pinging over time. 
  • Check your owner's manual: Always refer to your owner's manual for the most accurate fuel requirement for your specific vehicle. 



Is the GX 550 bigger than a 4Runner?


How big is the Lexus GX 550 compared to the Toyota 4Runner? The Lexus GX 550 is undoubtedly the larger vehicle compared to the Toyota 4Runner, boasting a 197-inch length vs. the 194.9-inch length of the Toyota SUV and offering additional width and height across trim levels.



How many gallons of gas does the GX 550 hold?


21.1 gal.
Fuel & MPG

EPA combined MPG17 MPG
Range in miles (city/hwy)316.5/443.1 mi.
Fuel tank capacity21.1 gal.
CO2 Emissions8.3 tons


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.