Does the 2024 Lexus 350h require premium gas?
The 2024 Lexus RX 350h does not require premium gas; regular unleaded gasoline (87 octane) is sufficient for everyday driving.
Powered by a 2.5-liter Atkinson-cycle hybrid paired with electric motors, the RX 350h is tuned for efficiency rather than high compression that would demand premium fuel. Lexus specifies regular unleaded gasoline as the minimum grade, and using higher-octane fuel is optional but typically offers no noticeable benefit in normal driving. The following breakdown explains octane options, what they mean for this model, and practical fueling considerations.
Fuel Octane Requirements
The owner's manual for the 2024 RX 350h clearly states that regular unleaded gasoline with an octane rating of 87 is suitable for daily use. Premium (higher-octane) fuel is not required to operate the vehicle, and most drivers won't see a meaningful performance or efficiency advantage from using it in this hybrid powertrain.
Octane options explained
Here is a quick guide to the fuel octane levels you may see and how they relate to the RX 350h.
- 87 octane (Regular unleaded): Minimum grade recommended for normal operation.
- 89-93 octane (Mid/Premium): Optional; can be used, but not required and is unlikely to deliver noticeable benefits in typical driving.
In practice, most owners will fill with regular 87-octane without any drawbacks. If you happen to have access only to higher-octane fuel, you can use it, but there’s no obligation to switch to premium for performance reasons.
Practical fueling considerations
For most driving scenarios—commuting, errands, and highway cruising—the RX 350h's hybrid system is optimized for efficiency with regular gasoline. Parked in hot or steep conditions, the vehicle will still run on 87 octane without issue. There is no separate premium-only tune or mode for this model; any potential gains from premium fuel are generally negligible in everyday use.
Bottom line
To sum up, the 2024 Lexus RX 350h does not require premium gasoline. Regular, 87-octane fuel is sufficient, and using higher-octane fuel is optional with no guaranteed performance or efficiency benefits for typical drivers.
Summary
The RX 350h is designed to run efficiently on regular unleaded gasoline. If you prefer to use premium fuel, you can, but it is not a requirement, and most owners will not notice a meaningful difference in performance or fuel economy.
