Does the 2018 Lexus Nx 300 require premium gas?
The 2018 Lexus NX 300 is designed to run on premium unleaded gasoline with an octane rating of 91 or higher for optimal performance. In North America, Lexus specifies premium fuel to maintain throttle response and efficiency; regular gasoline can lead to reduced power and responsiveness.
Fuel requirements for the NX 300
The NX 300’s turbocharged 2.0-liter engine is tuned to benefit from higher-octane fuel. Using premium unleaded gasoline helps prevent knocking and preserves the engine’s intended power delivery.
- Fuel grade: Premium unleaded gasoline with an octane rating of 91 or higher is recommended for the NX 300.
- Regular gasoline (87 octane) is not recommended and may result in reduced power, slower acceleration, and lower fuel economy due to engine timing adjustments or knocking.
- Regional variations exist; always check the owner’s manual or a local Lexus dealer for the octane specification specific to your market.
Sticking to the recommended premium fuel supports peak performance and long-term engine health.
What this means for daily driving
For everyday use, premium fuel helps the turbo engine maintain its designed power and responsiveness. If you refuel with lower-octane gas, you may notice diminished acceleration and efficiency, particularly under load or during aggressive driving.
Practical fueling tips
Keep these guidelines in mind to align with the NX 300’s fuel requirements whenever you refuel.
- Always aim for premium unleaded gasoline with an octane rating of 91 or higher.
- If premium is unavailable, use the highest-octane fuel available and avoid sustained high-load driving until you can refuel with premium again.
- Monitor fuel economy and engine performance; significant drops may indicate suboptimal fuel or a separate mechanical issue.
Note: For extended periods without access to premium fuel, consult the owner’s manual or contact a Lexus dealer for region-specific guidance.
Warranty and potential impacts
Using the fuel type specified by Lexus helps ensure that the warranty coverage related to the engine and fuel system remains aligned with the manufacturer’s design. Repeated use of lower-octane fuel beyond the recommended guidelines could affect performance, emissions, or warranty terms in some markets.
Summary
The 2018 Lexus NX 300 requires premium unleaded gasoline with an octane rating of 91 or higher for best performance and efficiency. Regular gasoline can be used only if premium is not available in the short term, but expect reduced power and economy. Always default to the recommended fuel grade and refer to the owner’s manual for your specific region’s octane requirements.
