1. Home
  2. /
  3. Car Care
  4. /
  5. Can I use 10w30 instead of 5w30 Oil in my Car?
can i use 10w30 instead of 5w30

Can I use 10w30 instead of 5w30 Oil in my Car?

It’s critical to change your engine oil frequently while knowing which motor oil is ideal for your car. However, considering the ambiguity of ‘Can I use 10w30 instead of 5w30″ requires a thorough understanding.

When it comes to motor oil, there are a lot of choices on the market. You may be wondering what the difference is between 5W-30 and 10W-30. The “W” stands for winter and the number is the thickness of the oil when it is cold. The lower the number, the thinner the oil, and the easier it is to start your engine in cold weather.

So, what is the difference between 5W-30 and 10W-30? 5W-30 is a thinner oil and is better for cold weather starting. 10W-30 is a thicker oil and is better for high-temperature protection. If you are unsure which oil to use, consult your owner’s manual or ask a qualified mechanic.

Most automobiles come with a buyer’s handbook that specifies the type of oil to use. But, how does changing your oil affect your car’s engine or other components? Say goodbye to unwanted doubts as we work together to unearth all the answers.

The w is a measure of how freely oil flows in the winters (hence the W). It thickens up to five times faster than 10w oil. In addition, the other number indicates the oil’s resilience to thinning at extreme temps. In other words, when your engine is running, both 5w30 and 10w30 oils have the same viscosity (SAE 30) and will operate as well. When the oil is cool, the 10w30 oil would be thicker and more viscous than the 5w30.

Car manufacturers conduct several studies and testing to provide the finest performing engine oil specs for your vehicle, so reading the handbook is a safe bet. Using the manufacturer’s specs is desirable if you’re in a circumstance in which you have no other alternative but using what is accessible between the dos. . If you’re stuck in the deserts and all you have is 10W30, this is the oil to use. Otherwise, use the 5W30 oil recommended for your vehicle.

Difference Between 5W-30 and 10W-30

Difference Between 5W-30 and 10W-30
Source: Shutterstock Licensed Image

The main difference between 5W-30 and 10W-30 is their viscosity. Viscosity is a measure of a fluid’s resistance to flow. 5W-30 has a lower viscosity than 10W-30. This means that 5W-30 will flow more easily and be less likely to cause engine wear at start-up.

Here’s a quick definition of both motor oils;

What is 10w30?

10w30 is a type of motor oil that is commonly used in vehicles. It is made up of a blend of oils that help to lubricate and protect the engine. This oil is used in both gasoline and diesel engines and can provide benefits such as improved fuel economy and reduced emissions. In addition, 10W-30 is a thicker oil and is better suited for use in older engines. It will provide better protection against engine wear and tear. However, it is also more likely to cause sludge build-up.

What is 5w30?

5w30 is a type of motor oil, which is light-grade oil and is designed to flow easily in cold weather and provide protection in high-temperature conditions. 5w30 is also a high-mileage oil, which means it is designed for vehicles with high mileage. Plus, 5W-30 is also a better choice for high-performance engines because it will flow more easily through smaller spaces. It is also less likely to cause sludge build-up.

5W–30 vs 10W–30 – Motor Oils at 100°C:

In high-temperature tests, 5W-30 oil flows better than 10W-30 oil. This means that it can better protect engine parts at high temperatures. 5W-30 oil also has a higher film strength than 10W-30 oil. This means that it can better protect engine parts from wear and tear.

10w30 Specification

The specifications for 10W30 motor oil include:

  • Viscosity: 10W30 motor oil has a viscosity of 10W at low temperatures and 30 at high temperatures.
  • Flashpoint: The flash point of this oil is above 300 degrees Fahrenheit.
  • Pour Point: The pour point of this oil is below -40 degrees Fahrenheit.
  • Viscosity Index: The viscosity index of this oil is above 150.

5w30 Specification

The notable specification of motor oil 5w30 include;

  • Viscosity: 5W30 motor oil has a viscosity of 5, which means it is more dilute at low temperatures.
  • Flashpoint of 5w30: The flash point of this oil is ->215°C (419°F).
  • Pour Point: The pour point of this oil is below -36°C.

9 Tips for Can You Use 10w30 instead of 5w30

Can You Use 10w30 instead of 5w30
Source: Shutterstock Licensed Image

Use this as a guide if you’re wondering whether you can use 10w30 instead of 5w30. When contrasted with low-viscosity oil, thicker or greater-viscosity metal oil seals better. Maintenance of motor & engine parts is improved with thicker oil.

1. Relatively Stable

10W-30 oil can withstand temperatures as low as -13 degrees Fahrenheit and as hot as 86 degrees Fahrenheit.

As a result, 10W-30 oil remains relatively stable at greater temperatures and pressures, and it can flow through important engine parts without producing excessive friction. It is, however, a heavier oil with a consistency that is comparable to grease.

Even more, in severely cold areas and at lower temperatures, it may not operate as effectively. In some circumstances, a thinner oil, such as 5W-30, may be preferable.

2. Vehicles with High Mileage

If someone prefers to use motor oils with a higher viscosity than what is advised, they almost certainly own a high-mileage car. When your automobile has logged a lot of miles, the oil channels that carry the oil to the engine begin to wear down. As a result, the oil pressure provided to the engine is lowered. Unless this problem is resolved, the performance of your car will suffer dramatically. So, how can we bridge this chasm? Using thicker oil than usual, these car owners compensate for their compromised pipelines and solve the problem of lower pressure.

When we talk of thicker oil, we’re referring to the number preceding the w. When the engine reaches high operating temperatures, this figure represents the thickness. As an example, instead of utilizing 5w30, they may start using 10w30. In this manner, even with worn-out passage pipes, they acquire what they want: enough oil pressure. If your vehicle has logged a lot of miles and the pressure applied by the oil is no longer sufficient, you may want to try this approach to get extra oil pressure.

3. Large Capacity for Dealing with Higher Temperatures

10w30 has a high capacity to handle higher temperatures without sacrificing engine performance quality. In hotter areas, it can also perform well in high temperature and pressure settings, adhering to the motor without thinning out. Because it is slightly thicker and has a higher load capacity, it is suited for heavy-duty diesel engines. This lubricant prevents engine deposits from accumulating on parts like pistons. It also protects engines from wear and tear due to friction and inadequate oil.

4. Sludge Management

The American Petroleum Institute has established a set of parameters. The specifications for any fuel oil to be deemed good for use must be fulfilled by the oil you choose for your engine. The good news is that the 10w30 satisfies all of the mentioned specifications, including the API SN rating. This essentially means that the motor is capable of protecting the piston of the engine from deposits created by combustion. Sludge management is included in the 10w30. This means there’s no possibility of the oil creating sludge or gelling at high temperatures. This is also appropriate for use after treatment. Another excellent suggestion is to keep in mind your 10w30 has an ACEA  A3/B3 or A3/B4 grade from the European Automotive Companies Association before you buy it.

5. Viscosity Index

The fundamental distinction between 5w30 & 10w30 is the Viscosity Index, which is higher in the latter. In simpler words, the thicker oil in 10w30 allows your engine to withstand high revolutions per minute at startup. The type of motor oil you use is mostly determined by the climate you reside in. The engine wear & tear statistics are not significantly different in most regions. Even if there is no change or only a minor loss in performance, if the thickness of the engine oil isn’t appropriate for the conditions, your car will feel sluggish in the chill & dead of winter. Using an engine oil that is not suggested will impair your engine’s protection over time. Engine oil is being used to lube engines to reduce friction among engine parts, extending the engine’s life.

6. Instruction Manual

Car manufacturers frequently recommend a certain type of fuel, such as one with a special synthetic mix or grade. Additionally, your instruction manual will mention whether any oil grades other than the approved ones are appropriate for use on the vehicle. For extremely cold climates, several automobile manufacturers advise a slightly reduced viscosity rating. Synthetic oils are adaptable, which means they work well to safeguard your vehicle’s engine regardless of the weather. 10w30 oil can provide your car with a wide operating temperature range, especially in higher temperatures.

7. Performance

The two motor oils have similar SAE ratings, which means they function similarly at high temperatures. The viscosity of the 2 when temps are high is referred to as number 30 in the names. When the environment is chilly, though, 10w30 thickens more quickly.

8. Lubrication

The lubrication offered by the 5w30 is superior to the 10w30, even though both are complete synthetic oils. In light-duty gasoline and diesel vehicles, as well as private automobiles, the 5w30 performs admirably. 10w30 engine oil, on the other hand, is recommended for vehicles with heavy-duty engines and commercial vehicles.

9. Effective Use

Your geographic location has a significant impact on the type of motor oil you should use. Even though both oils may be used in cold and hot environments, the 5w30 oil performs better in the winter than the 10w30 oil. In the summer, though, 10w30 is the greatest option.

Need to Use 10w30 Instead of 5w30

For can you use 10w30 instead of 5w30, there appears to be a slew of reasons, some of which are detailed here.

1. To Minimize Friction

To commence with, 10w30 motor oil fills all of the engine’s compartments and offers a level of safety. This protects them from all of the friction that would otherwise shorten the life of your engine. Furthermore, it minimizes friction during the engine’s start-up. The engine will remain cool as a result of this. This engine oil provides a clear layer over all of the engine’s components, reducing friction. They also keep the engine cool while reducing engine wear and tear during stop/start operations.

2. To Increase the Lifespan of the Engine

Because 10w30 motor oil keeps engine components from rusting, it extends the engine’s life. It gives the driver a quiet and smooth clutch and gear. The viscosity of oil does not alter even at high temperatures. 10w30 oil is ideal for biofuel and biodiesel engines. Although it is acceptable to use the oil in cold weather, it is preferable to do it in warmer weather.

3. To Reduce Oil Consumption

It reduces oil consumption in heavy-duty gasoline and diesel motors, resulting in higher fuel efficiency and better gas mileage, better sludge control, reduced wear and tear, safeguards against rust and corrosion, seamless, noiseless operation due to higher viscosity, and compatibility with advanced fuels such as biogas.

Frequently Asked Questions

So, here’s a list of the most often asked questions about using 10w30 instead of 5w30.

1. Is it possible to combine 10w30 with 5w30?

Most oils will blend perfectly if they are synthetically similar. As a result, merging 10w30 & 5w30 is not a problem because one would be topping it up. The engine will not be affected by combining the viscosity of the oils. Because the viscosity of 5w30 & 10w30 engine oils is similar, mixing them is not a bad idea.

2. Is 10w30 a Thicker Version of 5w30?

Since it has a greater viscosity in low temperatures, 10w30 is thicker than 5w30. During the winter season, the motor oil will run slower than 5w30. O oil with a thicker viscosity bonds better than oil with a lower viscosity. Engine & motor parts are better greased with thicker oil.

3. Is it possible to use 10w30 rather than 5w30?

It’s always a good idea to use the recommended amount of motor oil by the car’s maker; using the proper oil will give you real optimum gas mileage and safety. Because thick oil does not transfer heat as well as thin oil, using oil with a high viscosity might result in greater drag and high oil temperatures. Using oil with a lower viscosity than needed for your car, on the other hand, may cause the oil to shoot off the internal components when the car is moving. This will eventually result in metal-on-metal contact, causing the engine components to wear out.

4. In an Older Engine, Should I use Richer Oil?

Yes, rich engine oil such as 10w30 should be used for older vehicles and motors. Oil pressure in older engines will be improved by using thick engine oil. This is because as the engine ages, the clearances expand, requiring less oil for stronger protection.

5. Is it Better to use 5w30 or 10w30?

Both 10w30 and 5w30 engine oils are excellent choices. Understanding how either of them functions in a specific environment is critical for optimal performance. 5w30 is suitable for all seasons, providing optimal protection in both summer and winter. Because it creates low drag on bearing surfaces & other components of the motor, this oil also gives a good level of fuel efficiency to the user. Because it is thicker, 10w30 has better sealing capabilities for older motors.

6. Is 10W-30 Oil appropriate for High-Mileage Vehicles?

The 10W-30 motor oil is good high-mileage oil. Older engines, improve fuel economy by lowering oil consumption.  Older motors with more than 75,000 miles require heavier oil to adequately lubricate their vital engine parts and avoid oil spills, gunk, and deposits. A high-viscosity oil can assist resist engine wear and tear, as well as friction created by crushing gears on metal surfaces, in high-mileage engines. Before purchasing a high-viscous oil, consult your engine handbook to ensure that it is not too viscous for the engine and will not cause any issues with its operation.

7. Is using the Wrong Oil harmful to my Engine?

Using the improper fluid can lead to poor lube, heating, & possibly transmission failure. Even though the transmission has been drained, it may not be repairable. If you combine engine oil and brake fluid, you risk damaging your transmission.

8. Is it possible to put 10w Oil inside a 5w Car?

The advantage of using a 10W oil over a 5W oil would be that the 10W has fewer viscosity improvers. When viscosity improvers are added to oil, it behaves “thicker” at higher temperatures, but no lubrication is given.

9. Is 10W-30 Engine Oil Synthetic?

There are three types of 10W-30 engine oil: standard (mineral oil), synthetic, & synthetic blend. At normal operating temperatures, synthetic motor oil beats all other fluid types of 10W-30 oil. Synthetic blend oil in the 10W-30 range is also available. To safeguard the combustion engine & ensure a smooth engine operation, synthetic mix 10W-30 contains some features of complete synthetic oil. However, if the car requires a certain oil type, always check with your expert before swapping between standard & synthetic oil during an oil change.

10. Is it possible to blend Synthetic and Conventional Oil?

Yes, is the obvious reaction. While there is no danger in mixing synthetic and traditional motor oil, regular oil will distract from synthetic oil’s improved performance and lessen its benefits. Certainly, synthetic & conventional oil can be mixed safely.


If you frequently change your car’s oil, you may have questioned if you might use 10w30 oil rather than the standard 5w30 oil. This is a popular question asked by customers when deciding which motor oil can be used in their vehicle. Can you use 10w30 instead of 5w30? This is answered in this thread. Yes, it is correct. If you’re not in a position where reduced temperature startup anti-wear prevention isn’t a priority, 10w30 oil will suffice. The viscosity of engine oils is very important. The 10w30 is thicker and better suited to heavy-duty & older engines.

Consider the outside temperature, the influence on components, and fuel efficiency before selecting the proper engine oil. With this knowledge, you can answer the question, “Can you use 10w30 rather than 5w30?”Look through your owner’s manual to discover what oil the automaker recommends for your car.

So, we can conclude that using 10w30 rather than 5w30 is not a major issue. There are numerous related elements and many associations between the two oils depending on your preferences, with most aspects being similar to both types of oils.

So, as long as the oil viscosity is in the region prescribed by your vehicle’s manual, feel inclined to use the proper sort of oil for the car without fear of adverse effects. You should consult your instruction booklet for particular information on the motor oil recommended by your vehicle’s supplier and adhere to that specification.

In most situations, this merely includes the oil viscosity rating. That’s all we have to say. Hopefully, you found this article to be informative.

Related Article

Recent Posts