Both 85w140 and 75w140 oils have the same viscosity when cold, but differ slightly when hot. 85w140 might offer increased protection.
So, Can You Use 85w140 Instead Of 75w140? Substituting 85w140 for 75w140 depends on the specific recommendations for your engine and its application. The higher viscosity of 85w140 means it’s thicker. It offers better protection under extreme conditions or heavy loads. However, if you use a higher viscosity oil than recommended, it could impact fuel efficiency, and cause harder cold starts.
In this blog post, we’ll also explore the differences between 85w140 and 75w140 oils and when it might be appropriate to use one over the other.
Can You Use 85w140 Instead Of 75w140? Is 85W140 Equivalent To 75W140?
Yes, in many cases, you can use 85w140 instead of 75w140 is acceptable. However, you need to consider the specific recommendations outlined by your engine manufacturer. When both oils are cold, their viscosities are similar. But when they are heated, they differ slightly.
The viscosity of 85w140 is higher. This can provide better protection under extreme conditions or heavy loads. However, using a higher-viscosity oil might impact fuel efficiency. It can lead to more challenging cold starts. And it could have reduced flow characteristics in colder temperatures.
Also read: Is it okay to mix 15w40 and 10w30 oils?
What Is The Difference Between 75w 140 And 85w 140 – Comparison Table
Before getting into any discussion, let’s see the difference between 85w140 and 75w140.
| Specification/Feature | 85w140 | 75w140 |
|---|---|---|
| Viscosity at 100°C (CST) | 19.0 – 27.0 | 16.3 – 21.9 |
| Viscosity at 40°C (CST) | 140 – 245 | 105 – 140 |
| Viscosity Index | 98 – 105 | 180 – 190 |
| Pour Point (°C) | -12 to -9 | -45 |
| Flash Point (°C) | 204 – 238 | 204 – 238 |
| Base Oil Type | Mineral or Synthetic | Mineral or Synthetic |
| Recommended Applications | Heavy-duty vehicles, commercial fleets, off-road equipment | Heavy-duty vehicles, commercial fleets, off-road equipment |
| Benefits | High viscosity index, excellent wear protection, good thermal stability | Improved fuel economy, lower emissions, better low-temperature flow |
| Drawbacks | Lower fuel efficiency, higher emissions, thicker consistency | Higher cost, potentially less wear protection, may not meet manufacturer specifications |
The primary difference between 85w140 and 75w140 oils is their viscosity. 85w140 oil is thicker than 75w140 oil, which can make it better suited for high-load, heavy-duty applications. It has a higher viscosity index, which means it’s more resistant to changes in viscosity due to temperature changes.
This makes it a good choice for applications where the equipment is subjected to a wide range of temperatures. 85w140 oil also provides excellent wear protection and good thermal stability, making it a good choice for high-stress applications.
On the other hand, 75w140 oil is thinner and more fuel-efficient than 85w140 oil. It has a higher viscosity index, which means it flows better at lower temperatures, leading to improved fuel economy and lower emissions. However, it may not provide the same level of wear protection as 85w140 oil, especially in heavy-duty applications.
It’s important to note that while 85w140 and 75w140 oils may be interchangeable in some cases, it’s always best to follow the manufacturer’s recommendations for your particular application. Using the wrong oil can cause damage to your engine or equipment, leading to costly repairs.
85w140 vs 75w140: Understanding Viscosity Ratings
The SAE viscosity rating system is designed to provide consumers with a way of comparing the viscosities of different oils. A lower number indicates a lighter oil, while a higher number represents a thicker oil.
Viscosity is an important factor in the performance of motor oil. Thicker oils, for example, provide better protection and lubrication at high temperatures but may be too thick to flow efficiently at low temperatures. On the other hand, lighter oils may not provide adequate protection and lubrication at high temperatures.
Several factors can affect the viscosity of motor oil, including temperature, pressure, and the type of engine and components. This is why it is essential to choose an oil with the correct viscosity for your vehicle, as recommended by the manufacturer.
Also Read: Which is better 0W-40 or 5W-40
75w140 vs 85w140: Which Oil is Best for Your Engine? Consideration Tips
When choosing between 85w140 and 75w140 oil, it is important to consider the temperature and driving conditions of your vehicle.
If you live in a colder climate, for example, a lighter oil may be more appropriate as it will flow more efficiently at low temperatures. On the other hand, if you live in a hot climate, heavier oil may be the better choice as it will provide better protection and lubrication at high temperatures.
The manufacturer’s recommended oil viscosity is another critical consideration. Your vehicle’s owner manual will indicate the recommended oil viscosity for your engine and other components. It is essential to follow this recommendation to ensure optimal performance and to avoid damaging your engine.
It is also important to consider the compatibility of the oil with your vehicle’s components and transmission. Some vehicles may require a specific type of oil, such as a synthetic blend, full synthetic, or high mileage oil. Be sure to check the oil specifications and compatibility before making a purchase.
Another consideration is the oil’s performance under extreme conditions. For example, if you frequently tow heavy loads, drive in mountainous terrain, or engage in off-road activities, a heavier oil may be more appropriate. On the other hand, if you primarily drive in city or suburban conditions, a lighter oil may be sufficient.
Also Read: Use 75w90 Instead Of 75w85
Plain 85w-140 vs Synthetic 75w-140 – Comparison
| Specification | Plain 85w-140 | Synthetic 75w-140 |
|---|---|---|
| Viscosity | Thicker oil, with a viscosity rating of 85w-140 | Thinner oil, with a viscosity rating of 75w-140 |
| Composition | Conventional mineral oil with additives | Synthetic oil with advanced chemical formulations |
| Performance | Offers good wear protection and thermal stability, but may break down faster than synthetic oil | Provides excellent wear protection, oxidation resistance, and thermal stability, which can extend oil life and reduce engine wear |
| Price | Generally less expensive than synthetic oil | Typically more expensive than conventional oil |
| Recommended Use | Best suited for heavy-duty applications such as towing or hauling | Ideal for high-performance or heavy-duty applications, and can be used in a wide range of temperatures and operating conditions |
Overall, synthetic 75w-140 oil typically offers superior performance compared to plain 85w-140 oil, thanks to its advanced chemical formulations, improved wear protection, and longer oil life.
However, it’s important to note that the best oil for your particular engine or equipment depends on many factors, including the manufacturer’s recommendations, operating conditions, and maintenance schedule. If you’re unsure about which oil to use, it’s best to consult your owner’s manual or a trusted mechanic for guidance.
However, you can check this video for a better understanding of your query “Can You Use 85w140 Instead Of 75w140.”
FAQ’s
Check some queries related to 85w-140 vs 75w-140.
Q: Can I Use 85w140 Instead of 75w140 In My F250 Rear?
In our opinion, it’s not good to switch 85w140 from 75w140 for your particular F250 model. In general, it’s best to follow the guidelines in your owner’s manual to ensure that you’re using the recommended oil viscosity for your vehicle’s rear differential. Using the wrong oil viscosity can potentially cause damage to your differential, leading to costly repairs and will effect on your mileage.
But, 85w140 oil is typically thicker than 75w140, which can make it better suited for heavy-duty applications such as towing or hauling. If your F250 is regularly used for heavy-duty applications, using 85w140 oil may be appropriate. But it’s not recommended.
Q: Is Royal Purple 85w140 Good?
Yes, Royal Purple is a well-known brand of high-performance lubricants, and their 85w140 oil is formulated for use in heavy-duty applications such as commercial fleets, off-road vehicles, and racing vehicles.
According to the manufacturer, Royal Purple 85w140 is a synthetic oil that offers improved wear protection, better oxidation resistance, and better performance in extreme temperatures compared to conventional oils. It’s also designed to resist foaming and maintain its viscosity over time, which can help prolong the life of your engine or equipment.
Q: Can I Use 85w140 Instead Of 75w140 In My 2002 3/4 Ton Vehicle?
85w140 oil is typically thicker than 75w140, If your 2002 3/4 ton vehicle is regularly used for heavy-duty works, using 85w140 oil may be perfect.
Wrap Up!
So, Can You Use 85w140 Instead Of 75w140? Choosing the right motor oil for your vehicle is crucial to its performance, fuel efficiency, and longevity. When choosing between 85w140 and 75w140 oil, it is essential to consider the temperature and driving conditions of your vehicle.
However, the manufacturer’s recommended oil viscosity, and the compatibility of the oil with your vehicle’s components and transmission.
