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Can I use regular gas instead of premium in Lexus?


As a car owner, you might wonder if you can save a few bucks at the pump by using regular gas instead of premium in your Lexus. While it may seem like a small decision, the type of fuel you use can have a significant impact on your vehicle's performance and longevity. Let’s dive into the details to help you make an informed choice.


Understanding Lexus Fuel Requirements


Most Lexus vehicles are designed with high-performance engines that require premium gasoline. Premium gas typically has a higher octane rating (91 or higher) compared to regular gas (87 octane). The octane rating measures a fuel's ability to resist "knocking" or "pinging" during combustion, which is especially important for high-compression engines like those found in many Lexus models.


Using the recommended fuel ensures that your engine operates efficiently and avoids potential damage caused by knocking. Lexus specifies the fuel requirements for each model in the owner’s manual, so it’s always a good idea to check there first.


What Happens If You Use Regular Gas?


If your Lexus requires premium gas and you use regular gas instead, here are some potential consequences:



  • Reduced Performance: Your engine may not perform at its peak, leading to sluggish acceleration and less power.

  • Engine Knocking: Regular gas may cause knocking, which can damage engine components over time.

  • Lower Fuel Efficiency: Premium gas is formulated to optimize fuel efficiency in high-performance engines, so using regular gas could result in more frequent trips to the pump.

  • Potential Long-Term Damage: Prolonged use of regular gas in an engine designed for premium fuel can lead to costly repairs.


Are There Exceptions?


Some Lexus models may recommend premium gas but allow for the use of regular gas as an alternative. In these cases, the engine control unit (ECU) can adjust to the lower octane fuel, but you may still experience reduced performance and efficiency. Again, consult your owner’s manual for specific guidance on your model.


Is It Worth the Risk?


While it might be tempting to save money by using regular gas, the potential downsides often outweigh the short-term savings. Premium gas helps protect your engine and ensures optimal performance, which can save you money on repairs and maintenance in the long run.


Final Thoughts


In summary, if your Lexus requires premium gas, it’s best to stick with it. Using regular gas can lead to reduced performance, lower fuel efficiency, and potential engine damage. Always refer to your owner’s manual for the manufacturer’s recommendations, and if you’re ever in doubt, feel free to reach out to a trusted auto repair professional for advice.


At Kevin’s Autos, we’re here to help with all your car maintenance and repair needs. If you have questions about your vehicle’s fuel requirements or need assistance with any other automotive issue, don’t hesitate to contact us. Your car deserves the best care, and we’re here to provide it!


Frequently Asked Questions

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.



Is it okay to switch back and forth between regular and premium gas?


Is it bad to mix premium and regular gas? Well, not necessarily. If your car requires premium to run smoothly, but you aren't able to find a station with premium gasoline, it won't hurt to top off with regular gasoline. You do want to avoid running on regular gasoline for extended periods of time.



Which Lexus does not require premium gas?


A luxury vehicle like Lexus may need premium fuel, but the answer to these questions is actually model-specific. Some vehicles, like the Lexus UX 250h, can utilize regular 87-octane fuel, whereas other models, like the 2022 Lexus GX, require premium 91-octane fuel, so the Lexus gas type depends on the model.



Is it worth putting 91 instead of 87?


Does Premium Fuel Make Your Car Run Better? Some drivers swear that using a higher-octane fuel is better for a car's performance, but it's not. Engine computers can usually adjust their timing to account for the increased octane levels, so if you put premium gas in a regular car, you probably won't notice anything.



Which Lexus does not need premium fuel?


A luxury vehicle like Lexus may need premium fuel, but the answer to these questions is actually model-specific. Some vehicles, like the Lexus UX 250h, can utilize regular 87-octane fuel, whereas other models, like the 2022 Lexus GX, require premium 91-octane fuel, so the Lexus gas type depends on the model.



What will happen if I put regular gas instead of premium?


If you fill up such a vehicle with regular fuel, you may indeed be voiding a warranty. This will most often come into play if substituting regular for premium leads to significant engine knock or pinging that causes damage to the pistons or other engine components.



Can I put regular gas in premium Lexus is 350?


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.



Does the Lexus 350 require premium gas?


The Lexus RX's Gas Requirements
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.



What happens if I put the wrong gas in my Lexus?


Pumping the wrong fuel into your Lexus car can have serious consequences. Gasoline in a diesel engine can cause damage to the fuel system, engine misfire, and fuel contamination. Diesel in a gasoline engine can cause damage to the fuel system, engine damage, and reduced engine performance.



What happens if you put regular gas in a premium car Lexus?


For one, too low grade gas leads to engine knocking, which can damage your engine in the long run. In addition, using regular gas when you should use premium could void your warranty, which will cost you much more than your small savings at the pump.


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.