75W80 VS 75W85- Which is Better to Pick

Have you ever been standing in the automotive aisle at a store, completely lost when trying to pick out the right type of oil?

With all the different grades, viscosities, temperatures, and additives available, it can be quite overwhelming.

Today we’re going to be tackling the difference between two of the most popular oil types: 75W80 vs. 75W85. If you’ve ever been in this situation before and felt confused and unprepared, then this article will be helpful for you.

We’ll discuss everything you need to know about these two oils, and which is best for your vehicle. So, let’s get started with it.

75W80 VS 75W85

What is 75W80 Gear Oil?

75W80 gear oil is a lubricant specifically designed for manual vehicle transmissions and differentials. The number “75” represents the oil’s viscosity in winter conditions, while the “80” represents the oil’s viscosity.

This type of gear oil provides excellent protection against wear, corrosion, and foaming. It also improves shifting performance and fuel efficiency by reducing friction between gears. It is commonly used in high-performance vehicles that require a thinner gear oil to maximize power and efficiency.

Overall, 75W80 gear oil is a reliable choice for maintaining the performance and longevity of manual transmissions and differentials.

What is 75W85 Gear Oil?

75W85 gear oil is also a lubricant used in manual transmissions, transfer cases, and differentials. The number 75W85 represents the oil’s viscosity grade, with “W” indicating its suitability for winter use.

The lower the number before the “W,” the better the oil flows in cold temperatures. The viscosity grade after the “W” indicates the oil’s thickness. Therefore, 75W85 gear oil is a multi-grade oil that provides excellent performance in a wide range of temperatures.

It helps reduce friction, wear, and corrosion, improving the durability and performance of the gears. It is commonly used in vehicles that require API GL-4 or GL-5 rated gear oil.

Key Differences between 75W80 VS 75W85

When it comes to choosing the right gear oil for your vehicle, it’s important to understand the differences between different grades and viscosities.

Two commonly used gear oils are 75W80 and 75W85. While they may seem similar, there are some key differences that can affect their performance.

Here are some key differences between 75W80 VS 75W85 gear oils:


Viscosity refers to the thickness or resistance to the flow of a fluid, and it plays a crucial role in engine lubrication.

When comparing 75W80 vs. 75W85, it’s important to note that both are multi-grade gear oils with similar cold-temperature viscosity ratings.

However, 75W85 is slightly thicker at operating temperature compared to 75W80. It may provide better protection under heavy loads or high temperatures.

It’s important to consult your vehicle’s manual to determine the recommended viscosity for your engine and operating conditions.

If you use the wrong type of oil, then it can increase wear and tear, decrease fuel efficiency, and even engine damage.


Compatibility is the key term when it comes to choosing the right oil for your car. When selecting an oil, it’s important to make sure that it’s compatible with your car, but what does this mean?

When it comes to 75W80, most vehicles are compatible with this grade of oil, as long as the manufacturer recommends 75W-grade lubricants. However, some performance cars might require a higher viscosity grade such as 75W85.

75W85 is often recommended by vehicle manufacturers for higher-performance vehicles. It provides better protection against extreme loads and hot temperatures.

It includes cars that have high-load capacity engines, turbocharged engines, or those used for racing or other demanding applications. It’s also suitable for cars that operate in cold weather climates or spend a lot of time idling.

The compatibility issue is one of the key factors for evaluating whether you should use 75W80 or 75W85 in your vehicle. While most vehicles are compatible with both options.

But depending on the manufacturer’s recommendation; choosing the right oil can play a huge role in optimal performance and keeping your engine running smoothly for years to come.


When choosing between 75W80 and 75W85, the temperature range should be taken into account. The difference between the two lubricants lies in the maximum operating temperature they can handle.

Both oils are designed to operate within a specific temperature range, but the difference between them lies in their viscosity rating. The “75” in both oils indicates the viscosity rating at cold temperatures, while the “80” and “85” refer to the viscosity rating at high temperatures.

75W80 gear oil has a viscosity rating of 80 at high temperatures, while 75W85 has a viscosity rating of 85. It means that 75W85 is slightly thicker at high temperatures compared to 75W80.

In the end, it really depends on your specific vehicle and its needs. However, 75W85 may be a better choice for vehicles that are regularly exposed to high temperatures, as it provides slightly better protection and stability at those temperatures.


Picking the right oil for your vehicle, it’s important to understand the differences between different viscosities and additives.

75W80 and 75W85 oils are both multi-grade lubricants. It means they provide adequate protection in both hot and cold temperatures. The difference between the two is the amount of additives they contain.

75W80 oils typically contain fewer additives compared to 75W85 oils. It can be a good thing if your vehicle has a preference for lower levels of additives. However, if you’re looking for the best possible protection for your engine, 75W85 oils may be a better choice.


In terms of price, the winner is 75W80 oil. It is less expensive than 75W85 oil because of its lower viscosity and the fact that it is more commonly used in cars.

The exact price may vary depending on the brand and location. But on average, you can expect to pay around $8 to $10 per quart for 75W80 oil, while 75W85 oil can cost $10 to $15 per quart.

Overall, if you live in a colder climate or don’t push your engine to the extreme, 75W80 oil is a great choice for your vehicle. It’s more affordable and still provides sufficient protection for most driving situations.

However, if you frequently drive in hot weather or use your vehicle for high-performance activities, you may want to consider investing in 75W85 oil for added engine protection.

75W80 VS 75W85

75W80 VS 75w85- The Winner

When it comes to choosing between 75W80 VS 75W85 gear oils, it’s important to understand the differences and which one is best suited for your vehicle.

Both oils are similar in viscosity, but the main difference lies in the temperature range and their price.

75W80 is a thinner oil. It is better suited for colder temperatures. It provides good fuel efficiency, reduced wear, and tear on gears, and improved shifting performance.

On the other hand, 75W85 is a slightly thicker oil. It is an idle option for warmer temperatures. It offers better protection against high temperatures and heavy loads, making it ideal for heavy-duty applications.

If you look at the price, you can see 75W80 is slightly more affordable than the 75W85 synthetic gear oil.

So, the winner between 75W80 and 75W85 ultimately depends on your vehicle and the conditions in which it operates. If you live in a colder climate and want better fuel efficiency, go for 75W80.

If you’re operating heavy-duty equipment or live in a warmer climate, 75W85 may be the better option for you.

Frequently Asked Questions

Q. Can I use 75W80 instead of 75w85?

While 75W80 and 75W85 gear oils have similar viscosity ratings, they are not interchangeable. 75W85 oils have a higher load-carrying capacity and are recommended for transmissions and differentials with higher loads.

Using 75W80 oil in a system that requires 75W85 may lead to increased wear and reduced performance. Always use the recommended oil viscosity for your specific application.

Q. What is the difference between 75w and 75w85 gear oil?

The main difference between 75w and 75w85 gear oil is their viscosity. 75w85 is slightly thicker than 75w, making it better suited for high-stress applications such as heavy-duty trucks or towing. It provides better protection and lubrication for the gears under extreme conditions.

Q. What are 75w80 gear oil equivalents?

75w80 gear oil equivalents include synthetic 10W-30 or 5W-40 engine oils. These oils have similar viscosity and lubrication properties to 75w80 gear oil and can be used as substitutes in some applications.

Final Thought

Both 75W80 and 75W85 have their own unique advantages, so the choice really comes down to your own personal preferences and the particular needs of your vehicle.

While 75W80 is a great option for those looking for a reliable, low-viscosity fluid with excellent performance at low temperatures, 75W85 is a better choice for those who require superior protection and performance at higher temperatures.

No matter which one you choose, you’ll enjoy better protection, smoother shifting, and improved performance. Hopefully, this comparison between 75W80 VS 75W85 helps you to determine the right oil according to your needs. Thank you all.

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I am Engr. Z Eusuf Lubricant Specialist, Mechanical Engineer & has been working with engine lubricants for a long time and knows what makes them work best. I can help you find the right oil for your needs, and I have tips on how to keep your engine running at its best.