Can I Use Dexron VI Instead of III? What You Need to Know

AvatarByCarl Frisch

The Dexron series of automatic transmission fluids are a long-standing standard in the automotive industry. Dexron III has been used in many vehicles since its introduction in the 1980s, and is still recommended by many vehicle manufactures as a suitable transmission fluid. However, modern technology has led to the development of Dexron VI, which offers improved performance over its predecessor.

So, can you use Dexron VI instead of III? The short answer is yes, you can use Dexron VI instead of III. Dexron VI is designed to provide improved performance over Dexron III and is suitable for use in all vehicles that previously used Dexron III. In addition, it has been fully tested and approved by General Motors for use in all GM transmissions (except those with a Power Take-Off). Therefore, for most applications, it is safe to replace your vehicle’s existing Dexron III fluid with new Dexron VI fluid.

Automobile

Dexron III

Dexron III is a type of transmission fluid developed to meet the needs of General Motors automatic transmissions. It is a mineral-based fluid with a viscosity grade of 10W-30 or 10W-40 and is used in many vehicles built before 2005. The chemical composition of Dexron III includes base stocks and additives designed to improve its lubricating properties, reduce wear, and provide corrosion protection. It also contains friction modifiers that help reduce noise and juddering during shifting operations.

When it comes to viscosity grades, Dexron III is available in two grades – 10W-30 and 10W-40 – which are suitable for different operating temperatures. Generally speaking, the lower the viscosity rating, the better the performance at low temperatures while higher ratings are better suited for hot weather conditions.

Dexron III is primarily used in GM vehicles such as Chevrolet, Pontiac, Buick and Oldsmobile models built before 2005. It has also been approved for use in other non-GM vehicles such as Ford, Chrysler, Mitsubishi, Toyota and Honda models.

The advantages of Dexron III include its good wear protection capabilities, excellent oxidation stability and anti-foaming characteristics. On the downside, it does not provide sufficient protection against corrosion or shearing when exposed to high levels of stress or heat.

Dexron VI

Dexron VI is an improved version of Dexron III designed for use in GM vehicles built after 2005. Like its predecessor, it is a mineral oil based fluid with a viscosity rating of 10W-30 or 10W-40 but it also contains additional additives that provide improved performance over Dexron III.

The chemical composition of Dexron VI includes base stocks and additives that improve its lubricating properties while reducing wear caused by metal to metal contact during gear shifts. It also contains friction modifiers that help reduce noise and juddering during shifting operations as well as providing additional protection against corrosion and oxidation when exposed to high temperatures or stress levels.

When it comes to viscosity grades, Dexron VI is available in two grades – 10W-30 and 10W-40 – which are suitable for different operating temperatures. Generally speaking, the lower the viscosity rating, the better the performance at low temperatures while higher ratings are better suited for hot weather conditions.

Like its predecessor (Dexron III), Dexron VI is primarily used in GM vehicles such as Chevrolet, Pontiac, Buick and Oldsmobile models built after 2005 but it has also been approved for use in other non-GM vehicles such as Ford, Chrysler Mitsubishi Toyota and Honda models too.

The advantages of Dexron VI include improved wear protection capabilities due to its enhanced formulation compared to Dexron III as well as improved oxidation stability , anti-foaming characteristics ,corrosion resistance ,shearing resistance ,and cold temperature performance .

Comparing Dexron III And VI Fluids

When comparing both fluids – Dexron III vs Dexoron VI – there are several physical characteristics that must be taken into consideration such as their respective viscosity ratings (10w 30/10w 40)and colour coding (red/orange). Additionally both fluids have similar performance capabilities but due to their different formulations they offer varying levels of friction modifier which could affect their overall performance .

Can I Use A Different Type Of Transmission Fluid?

While using an alternative type of transmission fluid may be tempting due to cost savings or availability ,it’s important to understand when replacement may be necessary . Proper car maintenance dictates that transmission fluid should be changed every 30 000 miles or once every two years depending on how often you drive your vehicle . If you fail to do so ,your transmission can become damaged due to excessive wear caused by old dirty fluid .

There are alternatives available on the market today such as synthetic fluids which offer superior thermal stability ,better corrosion protection ,and reduced foaming compared to conventional fluids . High mileage fluids are another option specifically designed for older cars with over 75 000 miles on them . They feature special seal conditioners that help prevent leaks from worn out seals .

Introduction

When it comes to choosing the right fluid for your vehicle’s transmission, it’s important to understand the different types of fluids available and how they can affect your vehicle’s performance. The question “Can I use Dexron VI instead of III?” is one that many automotive enthusiasts have asked, so let’s take a closer look at what each type of fluid has to offer.

What is Dexron?

Dexron is a type of automatic transmission fluid used in many vehicles. It was first developed by General Motors and is now widely used in most cars and trucks. It helps lubricate the moving parts inside the transmission, preventing wear and tear on the gears and other components.

What is Dexron III?

Dexron III is the original formula of Dexron transmission fluid developed by General Motors in 1966. It has been updated several times over the years to meet changing needs, but it still remains one of the most popular types of transmission fluids on the market today.

What is Dexron VI?

Dexron VI is an updated version of Dexron III. It was designed specifically for newer vehicles that require more protection from wear and tear due to higher operating temperatures and more sophisticated transmissions.

Can I Use Dexron VI Instead Of III?

The short answer is yes, you can use Dexron VI instead of III in many cases. However, it’s important to check with your vehicle manufacturer before making any changes to ensure that you are using the correct fluid for your vehicle’s particular make and model as some vehicles may require a specific type of fluid for optimal performance.

FAQ & Answers

Q: What is Dexron III?
A: Dexron III is an automatic transmission fluid developed by General Motors to meet their performance requirements for use in their automatic transmissions. It is a petroleum-based fluid that is formulated with special additives to help provide superior protection against wear, rust, and corrosion and improved friction characteristics.

Q: What is Dexron VI?
A: Dexron VI is the latest generation of automatic transmission fluid developed by General Motors. It was designed to provide improved oxidation resistance, shear stability, low temperature performance, and corrosion protection over previous formulations. It also has enhanced friction properties to ensure smoother shifting and longer component life.

Q: What are the differences between Dexron III and VI?
A: The main difference between Dexron III and VI is the viscosity rating. Dexron III has a viscosity rating of 8 cSt at 100°C while Dexron VI has a viscosity rating of 11 cSt at 100°C. Additionally, the colour coding for both fluids differs with Dexron III being red in colour and Dexron VI being green in colour. Further differences include performance characteristics such as improved oxidation resistance, shear stability, low temperature performance, corrosion protection, foaming resistance, and cold temperature performance for Dexron VI as compared to its predecessor.

Q: Can I use a different type of transmission fluid?
A: Yes you can use a different type of transmission fluid such as synthetic or high mileage fluids if needed. However it is important to check with your car manufacturer first as some vehicles require specific types of fluids for optimal performance. Additionally it is important to ensure that your transmission fluid is regularly replaced or topped up according to the manufacturer’s recommendation as this will ensure better performance and longevity of your vehicle’s components.

Q: Can I use dexron vi instead of iii?
A: Yes you can use dexron vi instead of iii if recommended by your car manufacturer or mechanic however there may be certain circumstances where dexron iii may still be required so it would be best to consult with them first before making any changes.

In conclusion, Dexron VI is a newer and better formulation of automatic transmission fluid than Dexron III and can be used in place of Dexron III in most applications. However, it is important to consult the owner’s manual of the specific vehicle you are working on to determine the correct type and grade of lubricant for optimal performance.

Author Profile

Carl Frisch
Carl Frisch
With more than 30 years in the bicycle industry, I have a strong background in bicycle retailing, sales, marketing and customer service. I have a passion for cycling and a dedication to excellence. As a manager, I worked diligently to increase my capabilities and responsibilities, managing up to eleven mechanics (at Palo Alto Bicycles) and later as a working partner in my own store.

As the shop owner of Spoke n’ Word Cycles in Socorro, NM, the success of the mission was my responsibility, which I pursued passionately since we opened in 2003 through the spring of 2011. I am adept at managing owned and loan inventory, preparing weekly & annual inventory statements, and managing staff. The role as managing partner also allowed me tremendous freedom. I used this personal freedom to become more deeply involved in my own advancement as a mechanic, to spearhead local trail building, and advocating for cycling both locally and regionally.

As a mechanic, I have several years doing neutral support, experience as a team mechanic, and experience supporting local rides, races, club events. I consistently strive to ensure that bicycles function flawlessly by foreseeing issues and working with the riders, soigners, coaches and other mechanics. Even with decades of experience as a shop mechanic and team mechanic, and continue to pursue greater involvement in this sport as a US Pro Mechanic, and UCI Pro Mechanic.

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