As an automotive expert with a passion for the industry's latest trends and innovations, I'm always eager to share insights into the world of vehicles. When it comes to the largest gas tank capacity, it's an interesting topic that touches on the balance between fuel efficiency and range.

In the realm of full-size SUVs, which are often known for their spacious interiors and robust capabilities, the fuel tank capacity can vary significantly. It's important to note that the size of a vehicle's gas tank is influenced by a variety of factors including the vehicle's design, intended use, and fuel efficiency goals.

Based on the information provided, it seems that the Mercedes-AMG GLS63 (previously known as the GL63) and the Mercedes-Benz GLS-Class (formerly the GL-Class) both have a standard fuel tank capacity of 26.4 gallons. This is a substantial capacity that allows these vehicles to cover a considerable distance before needing to refuel.

The Nissan Armada also boasts a sizable fuel tank, with a standard capacity of 26.0 gallons. This is particularly impressive given the Armada's reputation for being a rugged and reliable full-size SUV.

Other notable mentions include the GMC Yukon XL and the Infiniti QX80, both of which are known for their spaciousness and performance. However, the exact fuel tank capacities for these models were not specified in the provided information.

It's also worth mentioning the Toyota Land Cruiser, which, despite having a slightly smaller fuel tank capacity of 24.6 gallons, is renowned for its off-road capabilities and long-term reliability.

When considering the largest gas tank, it's not just about the raw numbers. The efficiency of the engine and the vehicle's overall design also play a crucial role in determining how far a vehicle can travel on a full tank. For instance, a vehicle with a smaller tank but a more fuel-efficient engine may actually offer a longer range than a larger tank with a less efficient engine.

Moreover, the practicality of a large fuel tank must also be weighed against other considerations such as the vehicle's weight, which can affect performance and handling, and the environmental impact of burning more fuel.

In conclusion, while the Mercedes-AMG GLS63 and the Mercedes-Benz GLS-Class appear to have one of the largest standard fuel tank capacities among the full-size SUVs listed, it's essential to consider the full picture when evaluating the benefits of a large fuel tank. Factors such as fuel efficiency, vehicle weight, and environmental considerations should all be taken into account.

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Fuel Tank Capacities for 2017 Full-Size SUVsFord Flex. ... GMC Yukon XL. ... Infiniti QX80. ... Lexus LX 570. ... Mercedes-AMG GLS63 (previously GL63) Standard: 26.4 gallons.Mercedes-Benz GLS-Class (previously GL-Class) Standard: 26.4 gallons.Nissan Armada. Standard: 26.0 gallons.Toyota Land Cruiser. Standard: 24.6 gallons.More items...read more >>