Premium vs Regular Gasoline for Your Subaru Impreza: Is it Worth the Extra Cost?

Subaru Impreza is a top choice for car enthusiasts who want a car that is both practical and sporty. Its symmetrical all-wheel drive and boxer engine make it one of the more powerful compact cars on the market. But, many questions arise when it comes to choosing the right fuel for this car. Does it need premium gasoline? Is it worth the extra cost? In this article, we will dive into the topic of premium vs regular gasoline for your Subaru Impreza.

What is Premium Gasoline?

Premium gasoline is fuel that has a higher octane rating than regular gasoline. Octane is a measure of a fuel’s ability to resist "knocking" or "pinging" during combustion. Knocking can cause engine failure and can be caused by low-octane fuel. Premium gasoline usually has an octane rating of 91 or higher, while regular gasoline has an octane rating of around 87.

What are the Benefits of Using Premium Gasoline in a Subaru Impreza?

Using premium gasoline in your Subaru Impreza can provide several benefits such as:

Better Engine Performance

The boxer engine of Subaru Impreza is designed to deliver maximum power and torque. Using premium gasoline can help to optimize engine function by providing higher octane fuel that can resist knocking, thus improving engine performance.

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Improved Fuel Efficiency

Using premium gasoline allows the engine to burn fuel more efficiently, which can lead to better fuel economy. This means fewer trips to the gas station, thereby saving you some money in the long run.

Longer Engine Life

The higher quality of fuel can help to protect engine components from damage, which could allow the engine to last longer. This could lead to a reduction in maintenance cost and expenses associated with worn-out engine parts.

Are There Any Downsides to Using Premium Gasoline?

Despite the benefits, there may be some downsides to using premium gasoline, such as:

Extra Cost

Premium gasoline usually costs more than regular gasoline. Depending on the price of gasoline in your area, the extra cost can really pile up over time.

Negligible Effects

Using premium gasoline may not provide significant improvements in engine performance in some cars. It is important to consult your user manual to understand what is best for your Subaru Impreza.

Is Premium Gasoline Worth the Extra Cost?

The answer is yes and no. If you frequently drive under circumstances involving sporty and spirited driving, such as road trips, heavy traffic, or steep inclines, then investing in premium gasoline for your Subaru Impreza might be worth the extra cost for better engine performance, fuel efficiency, and longer engine life. On the other hand, if you use your car mostly for short commutes or grocery runs, you are unlikely to notice any significant difference in performance by using premium gasoline.

Other Ways to Maximize the Performance of Your Subaru Impreza

There are alternative ways to maximize the performance of your Subaru Impreza apart from using premium gasoline. Some of these methods include:

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Regular Maintenance

Regular maintenance of your car is crucial in ensuring that your vehicle continues to operate efficiently. This includes regular oil changes, air filter replacements, and spark plug maintenance.

Efficient Driving Habits

Your driving habits significantly influence your vehicle’s performance and fuel efficiency. Aggressively accelerating and braking, as well as excessive idling, can lead to lowered engine performance and poor fuel economy.

Car Tuning

Car tuning can help to optimize your vehicle’s performance. Tuning your car can help to adjust the fuel-air mixture and increase power output. You can seek the help of a professional mechanic or seek out a reliable tuning kit for your car.


In conclusion, there are several advantages and some disadvantages to using premium gasoline in your Subaru Impreza. When deciding whether it’s worth the extra cost, consider your driving habits, maintenance regime, and do a cost-benefit analysis to understand if the extra cost is worth the investment. Finally, it is crucial to consult your user manual and take professional advice before making any changes to your car’s fuel.

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Joseph Weaver

With a background in engineering and a passion for cars, Joseph brings a unique perspective to our blog. He's particularly interested in the technology and innovation behind Subaru's advanced safety features, and his articles on this topic are always insightful and informative. When he's not writing, he enjoys playing video games and spending time with his family.

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