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Can I use regular gas instead of premium in Acura?


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 Acura. While it might seem like a harmless decision, the type of fuel you use can significantly impact your vehicle's performance and longevity. Let’s dive into the details to help you make an informed choice.


Understanding Acura's Fuel Requirements


Many Acura models, especially those equipped with high-performance engines, are designed to run on premium gasoline. Premium gas typically has a higher octane rating (91 or higher) compared to regular gas (87 octane). This higher octane rating helps prevent engine knocking, which can occur when fuel combusts prematurely in the engine's cylinders.


Acura's engineering is optimized for premium fuel to ensure peak performance, fuel efficiency, and engine health. However, some Acura models may allow the use of regular gas as an alternative, but this comes with certain trade-offs.


What Happens If You Use Regular Gas?


If your Acura's manual specifies premium fuel and you opt for regular gas, here’s what you might experience:



  • Reduced Performance: Your vehicle may not accelerate as smoothly or deliver the same level of power.

  • Lower Fuel Efficiency: Regular gas can lead to decreased miles per gallon, negating any cost savings at the pump.

  • Engine Knocking: Prolonged use of regular gas in an engine designed for premium fuel can cause knocking, which may damage engine components over time.

  • Potential Long-Term Damage: While occasional use of regular gas might not cause immediate harm, consistent use can lead to carbon buildup and other issues that affect engine health.


When Is It Okay to Use Regular Gas?


Some Acura models are equipped with engines that can adapt to lower-octane fuel. If your owner's manual states that regular gas is acceptable, you can use it without significant risk. However, even in these cases, premium fuel is recommended for optimal performance and efficiency.


In emergencies, such as when premium gas is unavailable, using regular gas temporarily is unlikely to cause severe damage. Just make sure to switch back to premium as soon as possible.


How to Check Your Acura's Fuel Requirements


To determine the correct fuel for your Acura, follow these steps:



  • Consult your vehicle's owner's manual. It will specify whether premium fuel is required or recommended.

  • Check the fuel door or cap. Many vehicles have a label indicating the recommended octane rating.

  • When in doubt, contact your local Acura dealership or a trusted auto repair shop for guidance.


Conclusion: Stick to Premium for Peace of Mind


While using regular gas in your Acura might save you a few dollars in the short term, it could lead to reduced performance, lower fuel efficiency, and potential engine damage over time. For most Acura models, premium gas is the best choice to ensure your vehicle runs smoothly and efficiently. When in doubt, always refer to your owner's manual or consult a professional mechanic.


At Kevin's Autos, we’re here to help with all your car maintenance and repair needs. If you have questions about your Acura or any other vehicle, don’t hesitate to reach out to us for expert advice!


Frequently Asked Questions

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.



Can you put 87 gas in an Acura?


No — but it's recommended that you use a higher-octane fuel in your Acura for a number of reasons. According to Acura, premium gas is only required for the Acura NSX, but it is recommended for the MDX, RDX, TLX, RLX, and ILX.



Does my car really need premium gas?


In today's automobiles, advances in engine technology mean that even if the owner's manual recommends premium gasoline, the car will typically run on regular without issue and won't damage the engine in any way.



Is Acura good on gas?


Acura MPG Ratings: Cars
Acura Integra MPG – 30 mpg city / 37 mpg highway / 33 combined* Acura TLX MPG – 22 mpg city / 31 mpg highway / 25 mpg combined*



What gas does Acura require?


If you're the proud owner of a new Acura sedan or SUV, Premium unleaded 91 octane fuel is required to make it run – and recommended for the following Acura models: Acura Integra. Acura TLX. Acura RDX.



What happens if I put regular gas instead of premium in Acura?


When you fill your Acura's fuel tank with a lower octane level than is recommended, you'll experience pre-ignition (also known as engine knocking). Pre-ignition negatively affects your fuel economy and can damage your pistons or cylinder walls over time.



What happens if I put 87 instead of 91?


If you put lower-octane fuel into your high-octane vehicle, whether by mistake or to save money on gas, you'll probably notice the effects right away: things like poor fuel economy, reduced acceleration, and spark knock, which sounds like a high-pitched pinging or rattling noise.



What happens if I use 87 octane instead of 89?


If you put lower-octane fuel into your high-octane vehicle, whether by mistake or to save money on gas, you'll probably notice the effects right away: things like poor fuel economy, reduced acceleration, and spark knock, which sounds like a high-pitched pinging or rattling noise.



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.



Does the Acura MDX really need premium gas?


No, but Acura recommends it. You can certainly use regular gasoline in your MDX. Many Acura models even include knock sensors to prevent pre-ignition, which keeps your car safer on the Freehold roads. But if you want to enjoy the full potential of your luxury car, premium gasoline is the way to go.


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.