Can I Use 10w30 Instead Of 5w30? [Thicker/Viscosity]

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There is a lot of confusion surrounding motor oil viscosities. Many people don’t know the difference between 10w30 and 5w30. They assume that they can use either one in their car. So, you may be wondering if you can use 10w30 instead of 5w30 in your vehicle. 

Yes, you can use 10w30 instead of 5w30 in most cases. However, it is crucial to check your vehicle’s owner’s manual to ensure that 10w30 is the correct weight for your car.

5w30 engine oil

This blog post will clarify the confusion and explain the difference between these two motor oils.

Can I Use 10w30 Instead Of 5w30?

It’s a common question among car owners – can I use 10w30 instead of 5w30? The short answer is that you can, but there may be some consequences.

5w30 is a thinner oil than 10w30, which flows more easily at lower temperatures. That’s why it’s often used in colder climates or engines that frequently start in cold weather. 10w30, on the other hand, is a thicker oil designed for hotter conditions.

If you use 10w30 oil in a car designed for 5w30, the oil may not flow as easily at lower temperatures. That can lead to increased wear on the engine since the oil won’t be able to lubricate as well. In extreme cases, it could even cause engine damage.

What Do Oil Numbers Mean? 

You may wonder why there are two numbers; what do they mean? The numbers in motor oil refer to the oil’s viscosity or thickness. The oil’s viscosity changes when it heats up. The oil is thicker and does not flow as quickly when the engine is cold. The oil becomes thinner and flows more rapidly as the engine warms up. 

The lower the first number, the easier the oil flows when the engine is cold. The higher the second number, the better the oil flows when the engine is hot.

Number Before the Letter

The number before the “W” (in this case, “5” as in 5w30) refers to the oil viscosity when it is cold. The lower the number, the easier the oil to flow when the engine is cold. In this way, it can lubricate the engine parts properly. If the oil is too thick, it won’t flow well and cause your engine to overheat.

Number After the Letter

The number after the “W” (in this case, “30” as in 5w30) refers to the oil’s viscosity when it is hot. The higher the number, the better the oil flows when the engine is hot. The oil must maintain the same viscosity at high temperatures to keep your car engine away from damage.

What Is The Difference Between 10w30 and 5w30?

The main difference between these two oils is the viscosity. A 5w30 oil will flow easily when cold and maintain its viscosity at high temperatures better than a 10W30 oil. However, 10W30 oil will flow better when hot than 5W-30 oil.

Weight 

The weight of an oil refers to the thickness of the oil. Heavier oil will be thicker than lighter oil. The oil’s viscosity or thickness affects how well it lubricates your engine parts. If the oil is too thin, it won’t be able to lubricate your engine properly.

Engine Performance in High Temperature

The engine performance is directly proportional to the type of oil you use. Because if you use the wrong oil, it can directly affect the engine lubrication, which can cause severe destruction. 

Maximum Operating Temperature

The maximum operating temperature is the highest temperature the oil can keep your engine from drying. If the oil gets too hot, it will break down, and you will lose your engine parts.

Minimum Operating Temperature

The minimum operating temperature is the lowest when the oil can flow and keeps the engine running. Thicker oil can raise the engine temperature. Ultimately, your car will not work.

Key Takeaway: Choosing the right oil for your car is critical to ensure it flows well in cold and hot temperatures.

Engine Performance

The oil is thicker and does not flow easily when the engine is cold. The oil becomes thinner and flows more quickly as the engine warms up. Choosing an oil that will flow well in cold and hot temperatures is essential. These precautions are necessary to keep you from traveling difficulties.

The Viscosity of Engine Oil

The viscosity of engine oil is important because it affects how well the oil flows. It also maintains the health of your engine parts. The lower the number, the easier the oil to flow. The higher the number, the better it flows when hot.

Ideal Use

Both engine oils are ideal only when used under the required circumstances. However, you should use the oils to relate to the following conditions.

For 10w30

  • Best for the warm climate
  •  Choose if you have an older car
  •  If you do heavy highway driving

For 5w30

  • Suitable for cars in the cold climate
  • New cars run smoothly on this oil
  •  If you don’t drive heavily and stop at places

Efficiency of Fuel

The main difference between 10w30 and 5w30 is the thickness of the oil. 5w30 is thinner than 10w30, so it flows more easily in cold weather and provides better fuel efficiency.

10w30 is an excellent choice for high-mileage vehicles because it helps to reduce oil consumption and leaks. So, if you’re trying to decide between the two, it depends on your specific needs and what type of driving you do.

Check Out What Does 10w30 Mean? ‘Engine Oil Explained’:

YouTube video

Which Between 10w30 and 5w30 Is Better? 

The answer to this question depends on your individual needs. 10w30 is a great choice for people who live in warm climates and drive older cars. It is also a good choice for people who do heavy highway driving. If you live in a cold climate or drive a newer car, you may want to choose the 5w30.

Features 10w30  5w30
First Number10w refers to the low-temperature viscosity (-13.0°F)The first number (“5w”) is the high-temperature viscosity (212°F).
Second Number30 refers to the high-temperature viscosity (212°F)The second number (30″) is the low-temperature viscosity (-13°F).
Viscosity10w30 is thinner than other oils. 30 is the thickness of the oil.
Other FeaturesHelps to combat greenhouse gas emissions.

10w30

This engine oil creates a seamless layer over all engine components and reduces friction. It also keeps the engine cool while reducing wear and tear during stop/start operations.

sae 10w-30
A man using 10w30 synthetic oil

Major Specifications

  • 10w refers to the low-temperature viscosity (-13.0°F)
  • 30 refers to the high-temperature viscosity (212°F)
  • 10w30 is thinner than other oils and flows more easily in cold weather. This helps to improve fuel economy.
  • 10w30 helps to combat greenhouse gas emissions.

Benefits

  • 10w30 oil can help improve your engine’s performance by reducing friction and wear.
  • Using 10w30 oil can also help to improve your vehicle’s fuel economy by up to 2%.
  • It extends the life of your engine by reducing wear and tear.
  • 10w30 oil can also help to improve your vehicle’s performance in cold weather conditions.
  • It helps to reduce your vehicle’s emissions.

5w30

This oil increases the engine’s lifespan and does not retain its properties when placed under sheer environmental conditions.

Major Specifications

  • The first number (“5w”) is the high-temperature viscosity (212°F).
  • The second number (30″) is the low-temperature viscosity (-13°F).
  • 30 is the thickness of the oil. The lower the number, the thinner the oil.
  • 30 is also the pour point, meaning the temperature at which the oil will flow.

Benefits

If you live in a cold climate or drive a newer car, you may want to choose the 

  • If you’re looking for an oil that can maintain optimal performance in a wide range of temperatures, then 5w30 oil is a great option. This type of oil is designed to flow easily in cold weather and protect against wear and tear in hot weather.
  • 5w30 oil also protects against deposits and sludge, keeping your engine clean and running smoothly. It can also help improve fuel economy so that you can save money at the pump.

Can I Mix 10w30 and 5w30?

You should not mix 10w30 and 5w30 at any cost! While you can use 10w30 oil in most cases, it is always best to ensure that 10w30 is the correct weight for your car. You should also be aware of the technical specifications of each type of oil before making a decision.

Moreover, mixing 10w30 and 5w30 can cause a few different problems.

  • First, the wrong viscosity oil will be in your engine. This can cause increased wear on engine parts and decreased fuel economy. 
  • The incorrect oil could break down more quickly, leading to sludge build-up and other issues. 
  • Mixing different types of oil could lead to vegetation growth in your engine, which can cause clogs and other problems.

FAQs

What does the w in oil stand for?

The w in oil stands for winter. We write it with the first number (5w30) to indicate how well your engine performs in the winter with motor oil. Always keep this in mind while buying motor oil. engine

How is oil weight read?

For instance, the first number in the oil weight, “5” in 5W30 weight, refers to how thick the oil is when it’s cold. While the second number (after the “w,” i.e., “30”) refers to how viscous the oil is when it’s hot.

Can oil weights be combined?

You should not mix 10w30 and other oil weights. For example, if you usually use 5W-30 oil in your car, but you’re low on 5W-30, all you have is 10W-30. Each oil weight gets designed for specific weather conditions and driving styles. 

Mixing different oil weights can cause your car to run less efficiently. Just be sure to check your owner’s manual to see your car’s recommended oil weight.

Is 10w40 thicker than 10w30?

No, 10w30 is not thicker than 10w40. 10w30 is a thinner oil that flows more easily in cold weather, providing better fuel economy. 10w40 is a more viscous oil that adds to the better working of the car in high temperatures.

What kind of motor oil is thickest?

The thickest motor oil is 10w40. It provides better protection in high temperatures. Don’t worry about the car engine if you live in a colder region. 10w40 accelerates the performance of your engine even in cold weather. 

Final Consideration

You can use either oil weight depending on your needs and the conditions you will be driving in. If you are unsure, talk to your car services provider. Before deciding, you should know the benefits and drawbacks of each oil type. We hope this blog post has helped clear some confusion about motor oils.

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Matt's life has been driven by his great love for cars, from the revving sounds of his childhood to the digital tracks of Gran Turismo. He is a big fan of cars and loves to learn about their inner workings and share his knowledge with other car fans. Even though he doesn't have ASE certifications, he works on cars all the time, so he's always up to date on the latest innovations and trends. Matt doesn't just want to write; he also wants to connect with other people who love cars as much as he does.