Costco Gas Quality: Is It Any Good?

Costco Gas is known for its high quality and competitive prices.

The company prides itself on providing its customers with top-tier gasoline designed to improve its vehicles’ performance and longevity. Costco Gas is sourced from major oil companies and is regularly tested to ensure that it meets or exceeds industry standards for purity, octane level, and cleanliness.

One key factor that sets Costco Gas apart from other fuel retailers is its commitment to using high-quality, premium gasoline. This type of gasoline is designed to help improve the performance and efficiency of vehicles, making it a popular choice among drivers who want to get the most out of their engines. Costco Gas is also known for its low sulfur content, which helps to reduce emissions and improve air quality.

Another aspect of Costco Gas that customers appreciate is its competitive pricing. The company is known for offering some of the lowest prices on gasoline in the industry, making it a popular choice among budget-conscious drivers. Costco Gas also offers discounts and promotions to its members, which helps to make it an even more attractive option.

Is Costco Gas Good?

Costco gas is top-tier gasoline containing different detergents and additives to help keep your engine running smoothly and efficiently.

Costco’s gas is also known for being consistent, with many customers reporting that their cars run better on Costco gas than on other brands.

Additionally, Costco only sources its gasoline from major oil companies, such as Chevron and ExxonMobil, ensuring that their customers get high-quality products.

Furthermore, Costco’s gas stations are also known for having some of the lowest prices in the market, providing customers with great value for their money. Costco gas is an excellent choice for anyone looking for high-quality gasoline at a great price.

Related: Sam’s Club Gas Quality: Is it Any Good?

How Much Does Costco Gas Cost?

Membership costs $60 per year, and with that membership, Costco gas prices are typically lower than the competition.

The cost of gas at Costco can vary depending on location and market conditions, but generally, the prices are competitive with other major gas stations. The average cost of regular gas at Costco is around $2.50 per gallon, while premium gas is around $3.00 per gallon. Costco also offers diesel fuel at a slightly higher cost than regular gasoline.

Costco also offers discounts and promotions on gas, such as discounts for purchasing a certain amount of gas or filling up on certain days of the week.

Additionally, Costco rewards members with a credit card that earns cash back on gas purchases. Costco also has a mobile app that allows members to track their gas purchases and rewards.

Why Are Costco Gas Prices So Low?

This business strategy is known as a loss leader, where a company sells a product at a loss to drive more sales and increase overall profits. Costco’s gas prices are often significantly lower than other retailers, partly due to its buying power as a large wholesale club. They can purchase gas in bulk at a lower cost and then pass those savings on to their customers.

Another factor contributing to Costco’s low gas prices is its membership model. Costco is a membership-based store, meaning customers must pay an annual fee to shop there. This membership fee helps to offset the cost of lower gas prices, as Costco can make up for the loss on gas sales by charging a membership fee.

In addition, Costco also has a reputation for offering high-quality gasoline that is often sourced from major oil companies. This means that customers can trust that they are getting a high-quality product at a low price. Costco also has a strict policy of only selling gasoline at their locations that meet the highest quality and safety standards.

Is Costco’s regular gas as good as premium gas?

Costco’s regular gas is not as good as premium gas. The main difference between the two is the octane rating.

Regular gas typically has an octane rating of 87, while premium gas has an octane rating of 91. The higher the octane rating, the better the fuel is at resisting “knocking” or “pinging” during combustion caused by the air/fuel mixture detonating prematurely in the engine.

This can lead to improved performance and fuel efficiency in certain vehicles.

Additionally, premium gas is often formulated with more detergents and other additives that can help to keep the engine clean and running smoothly. These additives can help prevent the build-up of carbon and other deposits in the engine, leading to reduced performance and increased fuel consumption.

While it’s true that some vehicles may require premium gas to run optimally, many vehicles can run on regular gas without any issues.

However, if your vehicle is designed to run on premium gas, it’s recommended to use it as it can help improve performance and fuel efficiency and prolong the life of your engine. Ultimately, whether or not Costco’s regular gas is as good as premium gas will depend on your specific vehicle and its requirements.

Does Costco Gas Have Ethanol?

Costco Gas does contain ethanol, as it is a standard additive in gasoline in the United States. Ethanol is a biofuel from corn and other grains mixed with gasoline to increase octane levels and reduce emissions.

The amount of ethanol in gasoline can vary, but most gasoline sold in the United States contains 10% ethanol, known as E10. Costco’s gasoline is also rated at 91 octane, indicating that it is likely a blend of gasoline and 10% ethanol.

Costco Gas is known for its low prices and high quality. The inclusion of ethanol in its gasoline is part of the company’s commitment to providing a cost-effective and environmentally friendly fuel option for its customers.

What Other Gas Stations Offer “Top Tier” Gas?

Top Tier gasoline is the gasoline that meets specific standards set by a group of major car manufacturers. These standards include higher cleaning and performance additives that improve fuel economy, engine performance, and emissions control. 

Many major gas station brands offer Top Tier gasoline, including;

  • 76
  • ARCO
  • BP
  • Chevron
  • Esso
  • Mobil
  • Shell
  • Texaco
  • Wow

These brands have all met the standards set by the Top Tier program, which are meant to provide better fuel economy, engine performance, and emissions control. So, It is always better to go for Top Tier gasoline while filling up the tank.


Costco’s gas quality is generally considered good among consumers and experts. The company uses a strict supplier selection process to ensure that the fuel they sell is high quality and meets industry standards.

Costco also regularly tests its fuel to ensure that it meets its standards and is free of impurities and contaminants. Additionally, Costco offers competitive prices on its fuel, making it an attractive option for consumers.

However, it’s important to note that fuel quality can vary depending on location and storage conditions, so it’s always a good idea to check with your local Costco to ensure you get the best quality fuel possible.