Kirkland Synthetic Oil vs. Mobil 1: Determining the Best Performance

Engine oils take care of your vehicle engine’s life by preventing sludge and carbon buildup. They work as a protective barrier between constantly moving parts within your car’s engine. Maintaining optimal temperature range, the engine oils prevent overheating and reduce wear and friction. Regular oil changes are essential to maintain the engine’s youthful vigor and ensure it operates at its peak performance. Failure to do so can result in reduced fuel efficiency and a host of engine-related problems. In the list of hundreds of quality synthetic engine oils, Kirkland and Mobil 1 are two prominent names. The interesting point is that both are produced as synthetic oils but offer distinct features. Let’s compare Kirkland Synthetic Oil vs. Mobil 1 and discover which one you must go for.

Overview of Kirkland Oil

Kirkland SAE 5W-30 Motor Oil

Kirkland Synthetic engine oil is one of the top performers when you are looking for a game-changing solution. This is an ideal choice for owners who want to broaden their competency and avoid thermal breakdowns. The product helps to clean the internal parts of engines, reduce engine erosion, and give extreme fuel performance. Kirkland Synthetic oil is certified, which makes it a trustworthy solution to opt for.


  • Kirkland oil stops engine knock in cars with turbochargers and direct fuel injection.
  • It lowers the risk of engine wear and tear, surpassing industry standards.
  • It works well in hot and cold weather, helping the engine last longer.


  • It’s pricier due to its synthetic nature.
  • Not the best choice for brand-new vehicles.
  • If not disposed of properly, it can harm the environment.

Overview of Mobil 1 Oil Mobil Full Synthetic High Mileage Motor Oil 0W-20, 5 Quart :  Automotive

Mobil 1 5W-20 Motor Oil

ExxonMobil started making Mobil 1 Synthetic Oil in the early 1970s to meet the demand for high-performance lubricants in jet engines. In 1974, it became the world’s first synthetic motor oil. It’s designed to lubricate every engine part, ensuring top-notch engine efficiency. It maintains its viscosity, even on long drives, which means it continues to work effectively. Plus, it prevents sludge buildup, potentially saving you on repair costs. This oil is a reliable choice for your engine’s health.


  • Remains effective in cold conditions.
  • The oil actively cleans your engine, maintaining its health.
  • Offers long-lasting engine protection.


  • The initial cost is higher compared to Kirkland.
  • Not suitable for 2-cycle or aviation engines.
  • Not recommended for high temperatures.

Kirkland Synthetic Oil vs. Mobil 1 Kirkland Signature SAE 0W-20 Full Synthetic Motor Oil, 1 Quart,  6 ct : Automotive


Kirkland Synthetic Oil is made from a special blend of low and high-quality additives that offers enhanced performance. However, it is particularly best to use if you own an older car. On the other hand, Mobil 1 offers high-quality synthetic oil with top-notch additives to keep your engine safe. It works well for both new and older vehicles and is known for its engine protection from corrosion and wear.


Kirkland Synthetic Oil is famous for its feature of resisting power-robbing issues to keep your engine safe. It can last for about 7,000 miles before you need to change it. While Mobil 1 lasts for 10,000 to 15,000 miles. This makes Mobil 1 a better option, as this premium oil is made to ensure your engine runs smoothly and stays protected.


The price of engine oil can vary depending on the sellers. As per the estimated cost value, Kirkland Synthetic Oil is a cheaper option. On the other hand, Mobil 1 is more expensive because it’s a high-quality synthetic oil with special stuff that makes it last longer. So, while Mobil 1 might make your car go more miles before needing an oil change, Kirkland is a better choice if you want something on a budget.

Quality Test

Kirkland’s PQIA test assessment shows that Kirkland Synthetic Oil can handle high temperatures well, with a Viscosity Index of 176. Test reports show it has 1,342 ppm of Calcium, which is good for preventing corrosion. Both of the oils, as per result, perform well in high temperatures and have similar Calcium content that helps prevent corrosion. The thickness of the oil at different temperatures is nearly identical for both, making them evenly matched in performance.

User Reviews and Expert Opinion

Both Kirkland Synthetic Oil and Mobil 1 synthetic motor oil receive praise from users and experts. Kirkland is commended for its performance, particularly in older cars, although it may be slightly expensive. Experts highlight its ability to prevent low-speed pre-ignition and offer reliable temperature protection. Meanwhile, Mobil 1 receives positive user reviews for improved fuel efficiency, and experts appreciate its quality, impressive mileage, and affordability. Choosing between them depends on individual needs and preferences.

Engine Technology

When it comes to technology, Mobil 1 uses advanced lubricating oil technology. It helps to reduce friction and heat in your engine. It also includes special additives that prevent corrosion, rust, and sludge buildup. On the other hand, Kirkland Synthetic Oil is famous for its feature of resisting power-robbing issues to keep your engine safe. However, it is not as technologically advanced as Mobil 1, but it still is a good option if you need an affordable solution.

Expert’s Opinion

Sonner, a Canadian rider, reviewed Kirkland Signature synthetic motor oil from Costco on his YouTube channel “Cars with Sonduren.” He mentioned its affordable price of $25 for two large jugs and praised its performance compared to pricier brands. He also highlighted that it meets industry standards. Another certified lubrication specialist, Lake Speed Jr., evaluated Mobil 1 0W-40 European synthetic oil. He praised its fully synthetic Pao Ester blend and an oxidation value of approximately 35.7.

Comparison Table

NamePerformanceMileagePriceQuality TestEngine TechnologyRating
Kirkland Synthetic OilEnhanced performance, ideal for older carsLasts approximately 7,000 milesMore budget-friendlyViscosity Index: 176, Calcium: 1,342 ppmResists power-robbing issues8.5/10
Mobil 1High-quality synthetic oil suitable for new and older vehiclesLasts between 10,000 to 15,000 milesHigher initial cost due to premium qualityViscosity Index: 176, Calcium: 1,342 ppmAdvanced lubricating oil technology9/10

Pro Tips for Using Synthetic Oil

  • Stick to recommended oil change intervals for synthetic oil.
  • Check compatibility with your vehicle’s specifications and certifications.
  • Use a quality oil filter to trap contaminants effectively.
  • Let your engine warm up before aggressive driving.
  • Choose the right viscosity for your climate.
  • Stick to a regular maintenance schedule for oil changes and inspections.

Bottom Line

As per a detailed comparison and facts available, for older cars and budget-conscious consumers, Kirkland Synthetic Oil emerges as a dependable choice. It provides excellent performance without breaking the bank. In contrast, Mobil 1 is way too expensive, but it is a premium synthetic oil suitable for both new and older vehicles. Whether you’re looking for an affordable option or a reliable option, both oils offer quality that is truly commendable. To conclude, your informed decision will be shaped by factors such as budget limitations, the particular make and model of your vehicle, and your personal preferences.

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