Who Makes Costco Synthetic Oil

Hand Pouring Oil To Car Engine

Costco has some of the best synthetic oils for cars in its stores.

If you prefer these oils over other brands, you might be interested in knowing who manufactures them so that you have peace of mind that you are investing in the right product.


Costco synthetic oil is available in SAE 0W-20, 5W-20, and SAE 5W-30 under the private label “Kirkland” and is manufactured by Warren Distribution, one of the biggest oil companies in the United States.

To help you find the right product for your car, we have written a short guide below on who makes Costco synthetic oil and why people like it so much.

Who Makes Costco Synthetic Oil?

Closeup Of The Costco Sign Seen At The Entrance

Costco is a multibillion-dollar retail company operating in over eight countries worldwide.

This wholesale corporation sells products in bulk quantities and wholesale prices to their 118.9 million customers through a monthly membership.


Costco earns a revenue of around $196 billion annually and is the first company to rise from $0 to $3 billion in sales in just six years.

The quality of items at Costco is considerably better than many other big retail brands, and some of the fan-favorite products are toilet paper, rotisserie chicken, dog food, etc.

Along with these, the synthetic oils at the store are one of the most famous among car owners, leaving them wondering who manufactures them.

Costco’s SAE 0W-20, 5W-20, and 5W-30 synthetic oils are packed under the private label “Kirkland,” which gets them manufactured by Warren Distribution, one of the leading lubricant companies in the United States.


Founded in 1922, Warren Distribution produces a wide range of automotive and lubricants, including transmission fluid, power-steering fluid, motor oil, and brake fluid.

The brand produces private-label products for retailers, including Costco, Walmart, etc.

Why Is Costco Synthetic Oil So Good?

Many reasons make Costco’s synthetic oil famous amongst vehicle owners, some of which are listed below:

1. Iso Certified

Close-Up Of An Office Desk With Iso 9001 Folder

Warren Distribution uses modern blending and packaging facilities that are ISO 9001:2015 certified. This certification ensures that their synthetic oils meet the highest quality standards.

They use the best base oil and additives to make their synthetic oil which optimizes your engine’s performance and health.

Kirkland Signature synthetic motor oil is reliable and safe for many Costco members.

2. Viscosity Grades

Costco Wholesale Recently Reported

Costco offers three viscosity classes on their synthetic oil: SAE 0W-20, 5W-30, and 5W-30. You can select either one depending on your engine’s requirement and usage.

However, the recommended grade for hybrid and the latest gasoline engines is 0W-20.


Costco’s Kirkland Signature synthetic motor oil comes in 5-quart and 6-quart containers.

3. Industry Standards

View Of Costco Wholesale Storefront

Along with being ISO-certified, Costco’s synthetic oils exceed all the leading car manufacturers’ requirements and standards set by API, the American Petroleum Institute.

This means their motor oils provide your car with the ultimate engine protection while increasing fuel efficiency and extending motor life.

4. Lower Price

Hand Is Turning A Dice And Changes The Direction Of An Arrow

Costco’s synthetic motor oil quality is of the highest level per all industry standards, and technicians in the automobile industry swear by it.

But the company still offers them lower prices than other popular US brands. This can be why most people root for Costco’s synthetic oil because they are getting great value for the money.


In this guide, we discussed who makes Costco synthetic oil and why it is one of the best available options at a competitive price.

We hope you’ve gotten the information you sought and know why Costco’s Kirkland Signature synthetic oil outshines all other motor oil brands.

Frequently Asked Questions

Is Kirkland Oil Dexos Approved?

Costco’s Kirkland Signature synthetic oil is certified by dexos1™ Gen 2 and is approved for use in all gasoline engines.

Is Kirkland Oil High Mileage?

Kirkland’s synthetic oil can last an average of 7500 miles, with the viscosity holding up pretty well. However, it is not recommended for high-mileage cars with more than 100,000 miles.

How Often Should I Change My Engine Oil?

The recommended time limit for changing your Costco’s synthetic oil is 7,500 and 10,000 miles.

Any more mileage than this would cause oil contamination with carbon and metal particles, which can seriously harm your car’s engine.

What Are the Alternatives of Costco Synthetic Oil?

If you’re trying to find an alternative to Costco’s synthetic oil, try the Mobil 1 Extended Performance Synthetic Oil.

Not only does this oil help prolong engine life, but it’s also good for mitigating deposits and preventing sludge buildup.

What Is Synthetic Motor Oil?

Synthetic motor oil is a kind of lubricant created by breaking down and rebuilding petroleum molecules, usually used to improve the performance of engines and protect them against any harmful effects.

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