Dexos vs Mobil 1 Vehicle Engine Oil: 6 Differences

The type of engine oil you choose can make all the difference in the smooth operation of your vehicle. Two popular options on the market today are Dexos oil and Mobil 1 oil. However, the two are not the same and have different specifications and applications.

Dexos isn’t a brand but a set of standards developed by General Motors (GM), primarily for their vehicles produced after 2011.

On the other hand, Mobil 1 is a well-known brand of synthetic motor oil produced by ExxonMobil and is not limited to GM vehicles, making it a versatile choice for a wide range of car makes and models.

We’ll comprehensively explore the key differences between Dexos and Mobil 1 oils, helping you to choose the best oil for your vehicle.

6 Differences Between Dexos and Mobil 1 Engine Oil

Below are the key differences that set Dexos and Mobil 1 apart and help you make an informed choice for your vehicle.

• Origin and brand
• Application and compatibility
• Oil types
• Oil performance standards
• Temperature handling
• Cost considerations

Now, check out the key differences between Dexos and Mobil 1 engine oils in detail.

1. Origin and Brand

When comparing Dexos oil and Mobil 1 oil, it’s important to consider their origins and brand affiliations.

Dexos oil isn’t a specific brand, but rather a set of specifications and standards for engine oil developed by General Motors (GM). It’s designed to meet the performance requirements of GM vehicles and is recommended for use in these vehicles.

In contrast, Mobil 1 oil is a specific brand of synthetic motor oil produced by ExxonMobil. It’s widely used in various car makes and models and is known for its high-quality performance and protection.

2. Application and Compatibility

To understand the distinction between Dexos oil and Mobil 1 oil in terms of application and compatibility, you need to consider their specific qualities and specifications.

Dexos oil is specifically formulated to meet the requirements of General Motors (GM) vehicles produced after 2011. It’s designed to provide optimum performance and protection for these vehicles.

On the other hand, Mobil 1 oil isn’t limited to GM vehicles and can be used in a wide range of car makes and models, including Toyota, Ford, and Mitsubishi. It’s known for its excellent lubrication properties and ability to withstand high temperatures.

Both oils are compatible with most engines, but Dexos oil is specifically recommended for GM vehicles to ensure optimal performance and longevity.

3. Oil Types

To clearly distinguish between Dexos oil and Mobil 1 oil, let’s examine their distinct oil types.

Dexos-rated oils are typically synthetic or synthetic blends and aren’t available in conventional forms. GM’s Dexos rating system includes Dexos 1, Dexos 2, and Dexos D, designed for different engine applications.

Conversely, Mobil 1 is a fully synthetic motor oil that offers a range of benefits over conventional oils. Mobil 1 provides various oil variants tailored to specific requirements, such as High Mileage, Advanced Fuel Economy, Truck & SUV, Hybrid, ESP, FS, Supercar, Turbo Diesel Truck, and Racing Oils.

These variants address specific needs and ensure optimal performance and protection for different engine types and conditions.

4. Oil Performance Standards

Considering their respective specifications and certifications will help you understand the differences between Dexos oil and Mobil 1 oil in terms of oil performance standards.

Dexos-rated oils are specifically developed by GM to meet strict standards, ensuring optimal engine performance and protection. To ensure that Dexos oils meet General Motors’ requirements, they undergo rigorous testing.

In contrast, Mobil 1 oil consistently exceeds industry standards, including those set by the American Petroleum Institute (API) and the International Lubricant Standardization and Approval Committee (ILSAC) GF-5.

Mobil 1’s high-quality formulation and advanced additive technology make it a top choice for many car owners.

5. Temperature Handling

Dexos oil and Mobil 1 synthetic motor oil exhibit distinct temperature handling characteristics. Dexos oil, particularly Dexos 1 Gen 3, is exceptional in low-temperature performance, capable of functioning effectively at frigid temperatures as low as -40°F.

This extreme low-temperature resilience ensures that the oil remains fluid and operational even in the harshest cold conditions.

On the other hand, Dexos oil also generally withstands high operating temperatures found in modern engines, which can frequently exceed 200°F and even surpass 450°F, although the precise upper limit is not specified. This formulation equips it to tackle the demanding conditions of engine operation.

In contrast, Mobil 1, renowned for its temperature resistance, offers commendable low-temperature performance with protection extending down to -30°F. While impressive, it falls slightly short of the extraordinary -40°F lower limit Dexos oil offers.

Nevertheless, Mobil 1 maintains its fluidity and functionality in cold conditions. Mobil 1 truly excels in high-temperature handling, showcasing its prowess with protection extending up to 500°F.

This feature makes it well-suited for enduring the extreme heat generated during engine operations, even in the most demanding circumstances.

6. Cost Considerations

When considering the cost of Dexos oil and Mobil 1 oil, it’s important to compare the prices and factors that contribute to their variability.

Dexos-rated oils can range in price from about $5 to $68 or more for a standard-sized container. This variability is influenced by factors such as brand, specific Dexos rating, and container size.

In contrast, Mobil 1 oils are generally priced slightly higher, with prices typically ranging from $8 for a 1-quart container to around $29 or more for a 5-quart container or larger. Mobil 1 offers a variety of options, including different formulations and oil variants, which can influence the price.

It caters to various budgets and specific performance requirements. Therefore, when considering the cost, it’s important to evaluate your specific needs and budget to make an informed decision.

Comparison Chart Between Dexos and Mobil 1 Oil:

Aspect	Dexos Oil	Mobil 1 Oil
Origin and Brand	Developed by GM, not a specific brand	A brand produced by ExxonMobil
Application and Compatibility	Designed for GM vehicles post-2011	Compatible with various car makes and models
Oil Types	Typically synthetic blends, includes Dexos 1, Dexos 2, and Dexos D	Fully synthetic with various variants tailored to specific needs
Oil Performance Standards	Meets GM’s strict standards and undergoes rigorous testing	Consistently exceeds industry standards, including API and ILSAC GF-5
Temperature Handling	Exceptional low-temperature performance (down to -40°F) and high-temperature resistance	Good low-temperature performance (down to -30°F) and excellent high-temperature resistance (up to 500°F)
Cost Considerations	Prices range from about $5 to $68+	Prices typically range from $8 (1 quart) to around $29+ (5 quarts or larger)

What are the recommended oil change intervals for Dexos oil and Mobil 1 synthetic oil?

For both Dexos oil and Mobil 1 synthetic oil, the recommended oil change intervals can vary depending on factors such as oil variant, vehicle make and model, and driving conditions.

Mobil 1 synthetic oil is known for its extended mileage performance, allowing you to go up to 10,000 miles or one year between oil changes, whichever comes first. Certain Mobil 1 variants, like Mobil 1 Extended Performance, even offer intervals of up to 20,000 miles or one year.

Meanwhile, Dexos-rated oils, developed by GM, can have drain intervals of up to 15,000 miles, but the specific recommendations depend on the Dexos specification.

To ensure optimal engine performance and protection, always consult your owner’s manual or follow the oil manufacturer’s guidelines.

Can you mix conventional oil with Dexos oil or Mobil 1 oil?

Mixing conventional oil with Dexos oil or Mobil 1 oil isn’t recommended. It’s best to use one type of oil to ensure consistent performance and protection for your engine.

It is possible to alter the properties of different oils and potentially compromise their effectiveness by mixing them together. Dexos oil and Mobil 1 synthetic oil have specific formulations that are designed to meet certain performance standards.

By mixing them with conventional oils, these formulations can become diluted and lose their ability to provide optimal engine protection. If you’re switching from conventional oil to a synthetic like Mobil 1, performing a complete oil change is recommended to benefit from the synthetic oil’s superior properties fully.

Always consult your vehicle’s owner’s manual for specific oil recommendations and to avoid any potential issues with your engine’s warranty.

Is Mobil 1 suitable for use in aviation engines?

Using Mobil 1 oil in aviation engines isn’t recommended due to its specific formulation and the unique requirements of aviation engines.

Aviation engines operate under high temperatures, pressures, and loads, which demand specialized lubrication. Mobil 1 oil, although suitable for automotive engines, may not provide the necessary protection and performance in aviation engines.

Aviation engines require oils that have been specifically formulated to meet the demanding conditions of flight. These oils are designed to provide superior lubrication, thermal stability, and resistance to wear and corrosion. They also meet the strict safety standards set by aviation authorities.

Therefore, it’s crucial to use oils that are specifically approved for aviation use to ensure the safe and reliable operation of aviation engines.

Make the Right Engine Oil Choice Between Dexos and Mobil 1

When you decide between Dexos and Mobil 1 engine oils, it’s essential to consider your specific vehicle, its requirements, and your driving conditions. Dexos, with its GM-specific focus, excels in maintaining engine performance for post-2011 GM vehicles.

On the other hand, Mobil 1 offers versatility, excellent lubrication properties, and high-temperature resistance suitable for various car makes and models. 

The choice ultimately depends on compatibility, performance standards, and cost considerations. To get the best advice, always consult your owner’s manual and follow the manufacturer’s guidelines.

Whether you go with Dexos or Mobil 1, regular oil changes with the right oil will help ensure your vehicle’s smooth operation and longevity.