Does the 2024 GX550 require premium gas?

The 2024 GX550 does not exist in the official vehicle lineups, so there is no model by that exact name that requires a specific fuel grade. The confusion may come from mixing up two separate models: the Mercedes-Benz G-Class G550 and the Lexus GX series. Here’s how fuel recommendations typically work for the closest real counterparts, and how to verify for your exact vehicle.

What the naming confusion might refer to

Two popular SUV lines use similar alphanumeric styling but are from different brands. The Mercedes-Benz G-Class variant commonly referred to as the G550 is a high-end off-roader, while the Lexus GX series is a luxury SUV sold under the “GX” name. A misreading or hybrid nickname online could lead someone to ask about a “GX550.” Always confirm the exact model badge and year when checking the owner’s manual or speaking with a dealer.

Mercedes-Benz G-Class G550 fuel requirements

Key considerations for the G550

Before diving into specifics, note that the G550 is a real model and has distinct fuel requirements from the Lexus line. If you own or are researching a G550, here are the general guidelines you’ll encounter in the owner's manual and from Mercedes-Benz documentation.

Before listing the guidelines, here is a concise overview you should know:

• Premium gasoline (typically 91 AKI or higher in the United States) is generally recommended to maintain peak performance and engine longevity.


• Using regular unleaded gasoline may be permitted in some markets or under specific driving conditions, but it can reduce power and may trigger timing adjustments or knock protection strategies.


• Always check your VIN-specific manual, as octane requirements can vary by market and model year.


• Fuel quality and ethanol content should follow the local specification (often E10 is common in the US, but check regional guidance).

In summary for the G550, opting for premium gasoline is the safest bet to preserve performance and avoid potential knock, especially under load or hot conditions. Always verify with the owner’s manual or a Mercedes-Benz dealer for your exact vehicle configuration.

Lexus GX models and their fuel guidance

What to know about the GX lineup

There is no 2024 GX550 in Lexus’ official lineup, but the GX family includes models such as the GX 460 and newer GX variants in various markets. Fuel recommendations can vary by engine and year, so the following guidance applies to the closest real Lexus GX options and should be checked against your specific model.

Before the list, here are the core points you should consider for GX models:

• Many Lexus GX models in the U.S. have historically been able to run on regular unleaded gasoline (87 octane) as a minimum, with premium (91+ octane) recommended for maximum performance in some engines or trims.


• Using premium gasoline can result in smoother response and more consistent power output, particularly under sustained high-load conditions or in hot climates.


• Engine tuning, regional market variants, and model-year changes can affect octane requirements, so always consult the exact owner’s manual for your vehicle.

Bottom line for the GX family: follow the octane recommendation in your specific owner’s manual. If you’re unsure, starting with premium gasoline is a safe approach to ensure optimal performance and longevity until you confirm the exact specification for your vehicle.

Bottom line and practical guidance

The question about a 2024 GX550 appears to stem from a naming mix-up. There is no 2024 GX550 in common automotive lineups. If you meant the Mercedes-Benz G550 (G-Class) or a Lexus GX model, the guidance above applies. In short:

• Mercedes-Benz G-Class G550: premium gasoline is typically recommended for best performance and reliability.


• Lexus GX models: octane requirements vary by engine and year; check the owner’s manual for your exact vehicle, with premium as a safe default if you’re unsure.

Always verify the exact model and year with the owner’s manual or your dealership. Using the recommended octane helps maintain performance, efficiency, and engine longevity.

Summary

A misnamed “GX550” does not exist in the 2024 lineup. For the closest real models, premium gas is recommended for the Mercedes-Benz G550, while Lexus GX variants require checking the manual for the precise octane specification. When in doubt, consult the official documentation or a dealer to confirm the exact fuel requirements for your vehicle.

What kind of gas does a 2024 Lexus take?

premium unleaded gas
Whether your Lexus RX needs premium gas depends on its age. Most 2024 and 2023 models require premium unleaded gas with an octane rating of 91 or higher. Models released between 2012 and 2022 use unleaded gasoline with an octane rating of 87 or higher.

Which Lexus models do not require premium gas?

Several Lexus models do not require premium gas, including the Lexus ES 350, RX 350 (older models), NX 250 (some model years), and hybrid models like the UX 250h and NX 350h/450h+ (where premium is recommended but not required). To confirm the correct fuel for a specific vehicle, always check the owner's manual or the vehicle's fuel-door label. 
Models that typically use regular unleaded (87 octane) 

• Lexus CT 200h
• Lexus ES 300h and ES 350
• Lexus HS 250h
• Lexus NX 250 (some model years)
• Lexus NX 300h (older models)
• Lexus RX 350 (models from approximately 2012-2022)
• Lexus UX 250h (some model years) 

Models where premium is recommended but not required 

• Some hybrid models, such as the NX 350h and NX 450h+, can use regular gas, but using premium is recommended for optimal performance and to prevent potential engine knocking. 

How to be certain

• Check the owner's manual: This is the most reliable source of information for your specific vehicle. 
• Look at the fuel door: The required fuel type is often listed inside the fuel-filler door. 

What kind of gas does a Lexus GX 550 take?

The Lexus GX 550 requires premium unleaded gasoline, specifically 91 octane. Using premium fuel is recommended for this vehicle's engine, as it is designed for this octane rating to perform optimally and avoid knocking or pinging. 

• Required fuel: The GX 550 requires premium unleaded 91-octane gasoline. 
• Why it's needed: Premium fuel is necessary for the vehicle's engine performance, as outlined in the owner's manual. 
• What happens if you use lower octane: Using a lower grade fuel may lead to reduced performance and fuel economy. 
• Recommendation: It is best to follow the manufacturer's recommendation and use premium fuel to ensure the longevity and performance of your GX 550. 

What kind of gas does a Lexus GX 2025 take?

The 2025 Lexus GX requires premium, 91-octane or higher, unleaded gasoline. Using a lower-octane fuel can lead to decreased performance and, with repeated use, may cause engine knock and potentially long-term damage. 
Why premium is required

• Engine design: The GX's twin-turbo V6 engine is engineered to run on premium fuel for optimal performance. 
• Performance: Premium fuel provides higher resistance to knocking, allowing the engine to perform at its best. 
• Warranty: Using the required premium fuel is important to maintain the vehicle's warranty. 

What to do if premium fuel is unavailable

• Find a station with premium: In most cases, you can simply find a different gas station that offers 91-octane or higher gasoline. 
• Check your manual: Your owner's manual will confirm the exact fuel requirement for your vehicle.