Does the 2014 Lexus RX 350 require premium gas?

The 2014 RX 350 is designed to run on premium unleaded gasoline with an octane rating of 91 or higher. Regular gasoline is not the recommended option, as it can compromise performance and efficiency.

Official fuel guidance from Lexus

Key points from the owner's manual regarding octane requirements and fuel quality for the RX 350 are outlined below.

• Premium unleaded gasoline with a minimum octane rating of 91 (higher is acceptable) is recommended for the RX 350’s 3.5L V6 engine.


• Using regular unleaded gasoline (lower octane) may cause knocking, reduced power, and lower fuel economy.


• In some markets, the engine management system may adapt to lower-octane fuel, but performance and efficiency will typically suffer.

In short, sticking with premium fuel helps preserve the vehicle’s performance and efficiency as designed by Lexus.

What this means for drivers

praktische considerations for daily use, cost, and fuel availability when choosing fuel for the RX 350.

• Performance: Premium fuel supports optimal horsepower and throttle response.


• Cost: Premium fuel costs more per gallon, which affects overall running costs.


• Availability: Premium gasoline is widely available, though it may be less convenient in remote areas.

Drivers who frequently drive in hilly terrain, carry heavy loads, or seek maximum performance may benefit more from using premium fuel.

Warranty and maintenance notes

General guidance on how fuel choice intersects with maintenance and warranty considerations. Always refer to the owner’s manual for the definitive statement.

• Warranties and service recommendations are based on following Lexus guidelines for fuel quality; consistently using non-recommended fuel can affect engine performance and longevity in some scenarios.


• Use clean, high-quality fuel to minimize intake system issues and ensure smooth operation.

When in doubt, consult a Lexus dealer or customer service for your specific market and vehicle configuration.

Summary

For the 2014 Lexus RX 350, premium unleaded gasoline with an octane rating of 91 or higher is the recommended fuel. Regular gasoline is not advised if you want to maintain optimal performance and efficiency.

What kind of gas does a 2014 Lexus RX 350 take?

The 2014 Lexus RX 350 uses unleaded gasoline with an octane rating of 87 or higher. While it does not require premium gasoline, using a higher octane fuel is acceptable and may provide minor performance benefits, but it is not a necessity. 

• Required fuel: Unleaded gasoline with an octane rating of 87. 
• Optional fuel: You can use premium gasoline (91 octane) if you wish, but it is not required. 
• Important note: Avoid using gasoline with more than 15% ethanol. 

Is 2014 a good year for Lexus RX 350?

The 2013-2015 RX is likely the best of the best regarding RX build quality and long- term reliability. Make sure you get one with the lowest miles possible and that was serviced on time Everytime at a reputable shop.

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. 

Can I use regular gas in my Lexus RX 350?

Whether you can use regular gas in a Lexus RX 350 depends on its model year; models from 2012–2022 can use regular (87 octane) unleaded, while newer models from 2023 and beyond typically require premium (91 octane) unleaded gas. It is crucial to check your owner's manual for the correct fuel requirement to avoid potential engine issues like reduced performance, increased emissions, or damage. 
2023 and newer RX 350 models

• Most newer models with a turbocharged engine require a minimum of 91 octane premium unleaded gas.
• Using regular gas in these models is not recommended and can lead to decreased engine performance and mileage. 

2012–2022 RX 350 models

• These models are designed to run on regular unleaded gasoline (87 octane). 
• While you can use premium gas, it is not required and will not provide significant performance benefits. 

Important considerations

• Always check your owner's manual: This is the most reliable source for your specific vehicle's fuel requirements. 
• Avoid high-ethanol fuel: Do not use gasoline with more than 15% ethanol, and avoid fuels containing methanol or MMT. 
• Consider the long-term cost: For newer models requiring premium gas, the cost of using the correct fuel is a long-term investment to ensure proper performance and longevity of the engine.