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How big is a Subaru STI gas tank?

The Subaru STI, a high-performance sports car, boasts a sizable gas tank that can hold up to 15.9 gallons (60 liters) of fuel. This generous fuel capacity allows the STI to cover significant distances between fill-ups, making it a practical choice for enthusiasts who enjoy spirited driving.


Fuel Tank Capacity Breakdown


The Subaru STI's fuel tank is designed to provide ample range and convenience for its owners. Here are the key details about the STI's gas tank:



  • Fuel Tank Capacity: 15.9 gallons (60 liters)

  • Fuel Type: Premium unleaded gasoline

  • Fuel Tank Location: Rear of the vehicle

  • Fuel Tank Material: Plastic construction


The STI's large fuel tank allows drivers to cover significant distances without the need for frequent refueling stops. This is particularly beneficial for enthusiasts who enjoy taking their vehicles on long, spirited drives or track days.


Fuel Efficiency and Range


While the Subaru STI is known for its high-performance capabilities, it also delivers respectable fuel efficiency. With an EPA-estimated fuel economy of 21 mpg in the city and 27 mpg on the highway, the STI can cover up to 429 miles (690 km) on a single tank of fuel.


This impressive range, combined with the large fuel tank, makes the Subaru STI a practical choice for both daily driving and weekend adventures. Owners can enjoy the thrill of the STI's performance without constantly worrying about finding the next gas station.


Refueling Considerations


When refueling the Subaru STI, it's important to use the recommended premium unleaded gasoline. Using a lower-octane fuel can potentially lead to engine knocking and reduced performance. Additionally, the STI's fuel tank is located at the rear of the vehicle, so drivers should be mindful of the tank's position when pulling into gas stations.


Overall, the Subaru STI's generous 15.9-gallon fuel tank capacity, combined with its respectable fuel efficiency, makes it a versatile and practical choice for performance enthusiasts who value both power and range.

How fast does a wrx sti go 0-60?


While previous models historically hovered around the low-five-second range, the 2022 model has been fine-tuned to potentially dip below the impressive five-second threshold. This acceleration is made possible through a symphony of engineering, with a 2.4-liter turbocharged boxer engine being a key player.



How many gallons does a STI hold?


Fuel & MPG
254.4/349.8 mi. 15.9 gal.



What is STI horsepower?


2021 STI has 307 horsepower w/ 258 torque. 2023 WRX has 271 horsepower w/ 258 torque. The difference like I stated above on the track they are pretty equally matched stock due to the 2023 being better optimized allowing it to reach its peak horsepower and torque faster than any car they've made yet.



What happens if I put 87 in my STI?


You may notice some slight degradation in performance using a lower octane fuel, but the vehicle will automatically adjust engine timing, avoiding a preignition condition. The WRX STI, on the other hand, requires 93 octane.



How big is a 500000 gallon tank?


500000 Gallon SteelCore Corrugated Bolted Steel Tank with dimensions of 74.3 feet in diameter and 17.9 High.



How fast is a stock STI?


The Subaru WRX STI is capable of reaching high speeds, owing to its excellent performance to its powerful engine. The Subaru WRX STI has a top speed of 174 mph. On the other hand, the Subaru WRX model can only reach speeds of 159 mph.



How big is the gas tank on a 2014 Subaru STI?


Fuel & MPG
287.3/388.7 mi. 16.9 gal.



How big is an STI gas tank?


270.3/365.7 mi. 15.9 gal.



Can you mix regular and premium gas?


There's nothing wrong with mixing premium and regular gas in the same tank. In fact, this is how midgrade gas is formulated at the station. Rather than drawing from a separate storage tank for each octane rating, gas pumps actively mix high-octane fuel with lower-octane fuel to create midgrade gas.



Does STI need premium gas?


Performance Subaru Models
Subaru's performance-oriented models, including the WRX, WRX STI, and BRZ, require premium fuel with an octane rating of 91 or higher to perform as intended. These models are equipped with high-compression engines that benefit from the anti-knock properties of premium fuel.


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.