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Why does Lexus NX require premium gas?

The Lexus NX, a popular luxury crossover SUV, requires the use of premium gasoline, typically 91 octane or higher. This is due to the engine design and performance characteristics of the Lexus NX, which is engineered to operate optimally with higher-octane fuel.


Engine Design and Performance


The Lexus NX is equipped with a turbocharged 2.4-liter four-cylinder engine that produces 275 horsepower and 317 lb-ft of torque. This engine is designed to take advantage of the higher octane rating of premium gasoline, which allows for increased compression ratios and more advanced ignition timing.


The higher octane rating of premium fuel helps prevent premature detonation, or "knocking," which can occur in high-performance engines like the one found in the Lexus NX. Knocking can cause damage to the engine over time, so using the recommended premium fuel is essential for the proper operation and longevity of the Lexus NX's engine.


Fuel Efficiency and Performance Benefits


In addition to preventing engine damage, using premium gasoline in the Lexus NX can also provide some performance and fuel efficiency benefits. The higher octane rating allows for more advanced ignition timing, which can result in a slight increase in horsepower and torque. This can translate to improved acceleration and overall driving dynamics.


Furthermore, the use of premium fuel can also contribute to slightly better fuel economy, as the engine can operate more efficiently with the higher-octane fuel. However, the difference in fuel economy between premium and regular gasoline is typically small, often less than 1 mile per gallon.


Recommendations and Considerations



  • Lexus strongly recommends the use of premium gasoline (91 octane or higher) in the Lexus NX to ensure optimal engine performance and longevity.

  • Using a lower-octane fuel, such as regular gasoline, may result in reduced power, decreased fuel efficiency, and potential engine damage over time.

  • While the cost of premium fuel may be higher, the benefits of using the recommended fuel type outweigh the additional expense for Lexus NX owners.


In conclusion, the Lexus NX requires premium gasoline due to its high-performance turbocharged engine design, which is engineered to take advantage of the higher octane rating. Using the recommended fuel type is essential for maintaining the Lexus NX's performance, fuel efficiency, and long-term engine health.

Does the 2025 Lexus NX require premium gas?


2025 Lexus NX Hybrid SUVs should be refilled with premium gasoline, typically 91-octane or higher. This type of fuel allows the model to operate at the level it was designed for. Filling the tank with regular unleaded fuel may work, but you'll likely notice a dip in performance and capability as a result.



What happens if you put regular gas in a Lexus NX?


WHAT HAPPENS IF I PUT REGULAR GAS IN A VEHICLE THAT REQUIRES PREMIUM GAS? Using lower octane fuel in a vehicle that requires premium gas could cause internal damage, especially within a luxury vehicle like the Lexus NX. Some issues you may start experiencing include: Reduction in fuel economy.



Do you really need premium gas in a Lexus?


But, does Lexus require premium gas? If you want to continue to enjoy the outstanding power and high-level efficiency offered in new Lexus models, you'll want to utilize the recommended Lexus gas type. Some Lexus vehicles will require premium 91-octane fuel while others can use regular 87-octane fuel.



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.


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.