Difference Between 5W30 and 10W30 Oil

Choosing the right motor oil is essential for ensuring your vehicle’s engine’s longevity and optimal performance. However, with so many options available, it can be difficult to know which one to choose. In this article, we’ll comprehensively compare two of the most commonly used motor oils: 5W-30 and 10W-30. Whether you’re a seasoned car enthusiast or just looking to learn more about motor oil, we’ve got you covered.

What Is Viscosity?

Viscosity is a measure of a fluid’s resistance to flow. It denotes opposition to flow. The reciprocal of the viscosity is called fluidity, a measure of the ease of flow.

The letter “W” stands for winter. Though, some people may think that it signifies weight. Actually, the higher the number in W, the worse and less efficient motor oil is for winter weather, and conversely, the lower the number near W – the lower temperatures the oil can withstand.

Viscosity changes with temperature. It decreases as the oil temperature rises, and in this case, a higher viscosity (thicker) engine oil will seal better than a low viscosity oil. Thicker engine oil will also provide better lubrication of critical engine parts.

What’s the Difference Between 5w30 and 10w30

Currently, 5w-30 and 10w-30 are the most prevalent motor oils. Let’s look closely at their peculiarities and, of course, distinctions.

5w30 Features

5W-30 oil is thinner and more viscous at lower temperatures than 10W-30 oil, making it better suited for use in colder climates or during the winter months. This is because it flows more easily at low temperatures, allowing it to circulate more quickly throughout the engine and provide better protection during startup. However, 5W-30 oil is also less durable than 10W-30 oil, which may need to be changed more frequently to maintain optimal engine performance.

5w30 is a thin variety of motor oil, which is the most suitable for engines working in winter or regions with cool weather. And the number “5” signifies that as it stands for the lowest viscosity index.

Keeping such a rating, oil runs smoothly even if the temperature is extremely low. Simultaneously, the number “30” stands for the oil’s thickness at high temperatures. Thus, 5w30 is the perfect option if you seek oil, allowing your motor to function properly at low temperatures and in the winter.

Furthermore, though 10w30 is more suitable for warm climates and summer weather, you are free to apply 5w30 as well. Basically, 5w30 is the best option for northern America’s states and Canada, as winters can be very cold in these regions.

10w30 Features

10w30, a high-mileage sort of motor oil, keeps a viscosity index of 10 and is the most appropriate option for warm and even high temperatures, serving great for hot summers. 10w30 runs smoothly at high temperatures due to its higher viscosity level.

To be exact, admixtures, known as “viscosity improvers,” are applied to spread and contrast it. The thickness of 30 provides complete protection of the motor during temperature rises or falls. So, 10w30 is a great variant for driving in hot or even desert regions, including California and Nevada.

10W-30 oil is thicker and more viscous at higher temperatures, making it better suited for use in warmer climates or during the summer months. This is because it maintains its viscosity better at high temperatures, providing better engine protection under these conditions. Additionally, 10W-30 oil is often recommended for use in high-mileage engines, as its higher viscosity can help reduce oil consumption and improve engine performance. However, it may not be as effective in colder climates or during the winter months, as it can become too thick and challenging to circulate when temperatures drop.

5w30vs 10w30 Comparison

Let’s look at the difference in performance using the example of two oils from the same company: 5W-30 and 10W-30 Castrol EDGE Synthetic Motor Oil

Here is another comparison of oils from the popular brand:

The Mobil 1 120762 Synthetic Motor Oil 10W-30 has a viscosity rating of 10W-30, which means it is thicker and more viscous at higher temperatures than the Castrol Edge 5W-30 Advanced Full Synthetic Motor Oil, which has a viscosity rating of 5W-30. The Mobil 1 oil is designed to provide outstanding overall engine protection, while meeting or exceeding the latest industry performance standards, and it can protect critical engine parts for up to 10,000 miles between oil changes.

On the other hand, the Castrol Edge 5W-30 Advanced Full Synthetic Motor Oil is suitable for use in automotive gasoline and diesel engines where the manufacturer recommends an ACEA C3 5W-30 lubricant. It is Castrol’s strongest oil and is approved for use in VW Group vehicles that require a VW 504 00 / 507 00 5W-30 lubricant, including vehicles with variable service intervals and diesel vehicles equipped with a diesel particulate filter.

As we see based on this comparison, there is no significant difference between them, because of which it would be worth worrying too much. If you still can’t define what to choose – pick a 5W-30 oil.

In summary, while both oils are advanced full synthetic motor oils, the Mobil 1 120762 Synthetic Motor Oil 10W-30 is thicker and more viscous at higher temperatures than the Castrol Edge 5W-30 Advanced Full Synthetic Motor Oil. It is designed to provide outstanding overall engine protection and can protect critical engine parts for up to 10,000 miles between oil changes. The Castrol Edge 5W-30 Advanced Full Synthetic Motor Oil is suitable for use in a range of automotive gasoline and diesel engines and is Castrol’s strongest oil.

Ultimately, the choice between 5W-30 and 10W-30 oil depends on a variety of factors, including the climate and driving conditions in which the vehicle will be used, as well as the manufacturer’s recommendations. It’s important to consult the owner’s manual and follow the recommended oil weight and viscosity for your particular vehicle make and model to ensure optimal engine performance and lifespan.

Manufacturer’s Prescriptions

Along with selecting motor oil depending on the climate you drive in, it’s even more crucial to follow the guidance of your vehicle’s manufacturer. Engineers of each car brand determine what weight of motor oil is the most appropriate for a certain automobile.

By following their guidance, you will guarantee the best possible protection for your motor along with maximal fuel economy.

Applying 10w30 motor oil for engines designed for 5w30 may cause excessive temperatures and increased resistance. Doing vice versa may induce oil to fly off and scatter among the motor’s internal parts while driving. Consequently, the engine’s lifespan will be shortened.

As a rule, automotive companies indicate what oils are compatible with their motors, and you can choose among the recommended ones.

FAQ

5w30 vs 10w30: What’s Better?

Actually, both motor oils are excellent. So, you need to know what oil works better in a specific ambiance.

5w30 is suitable for each season and can provide maximal protection at low winter and high summer temperatures. Furthermore, it provides a decent level of fuel economy as it produces less drag on the motor’s moving details plus bearings.

But, 10w30 keeps greater thickness, offering enhanced sealing abilities for older motors as their clearances extend and demand less liquid oil for more efficient protection.

Before opting for any type of oil, first, read your motor’s manual and discover what oil the manufacturer prescribes for it.

5w30 or 10w30 For Summer?

Both 5W30 and 10W30 oils are suitable for summer. However, 10W30 is preferred in warmer climates. If your maximum temperature in summer does not exceed 35 Celsius (or 95 Fahrenheit), then it is better to use 5w-30. In a case when the temperature in summer is even higher, then it is better to use 10w-30.

Should I Use 5W30 Or 10W30?

First, check your owner’s manual to see if 5w30 or 10w30 can be applied. If it is possible to use any of these oils, you should choose the one that is more suitable for the temperature conditions in your region.

What Is Thicker 5w30 Or 10w30?

It has the same thickness in warm temperatures, but in cold weather, 10w30 is thicker than 5w30 and will flow more slowly.

Can You Mix 10w30 And 5w30?

Yes, you can mix 5w30 and 10w30 oil. They have the same viscosity at the same temperature, making them blend nicely in your car. So mixing them is safe and won’t seriously harm your engine.

What Happens If I Use The Wrong Oil?

Your engine will run, but the wear will increase, and you must get it repaired soon.

To Sum It Up

5w30 oil is designed to operate in ambient temperatures down to -30 degrees Celsius (-22 degrees Fahrenheit), making it an excellent choice if you live in colder climates such as the Northeastern United States or Canada. The 5w30 is also a great choice if you live in warm climates reaching 35 degrees Celsius or 95 degrees Fahrenheit.

So, 5w30 motor oil works great no matter how high or low the temperature is. It gives a great fuel economy by reducing drag on bearings and moving motor details.

Being thicker, 10w30 ensures a more efficient sealing ability for aged motors and protects their widened clearance better.

And don’t forget to consult the manufacturer’s manual first!