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5W 30 Oil VS 10W 30 Oil: Facts You Should Know

5W 30 Oil VS 10W 30 Oil: Facts You Should Know

When it comes to engine oil, there is a big difference between 5W 30 and 10W 30. 5W 30 is a lower viscosity oil, while 10W 30 is a higher viscosity oil. 

Lower viscosity oils are designed for use in engines that require less pressure to turn. Higher viscosity oils are designed for use in engines that require more pressure to turn.

5W30 is a lighter weight oil meant for use in petrol and diesel engines that are not under heavy loads, while 10W30 is a heavier weight oil good for use in more powerful engines. 5W30 also has a lower thermal range, meaning it can be used at lower temperatures without degrading performance.

In recent years, these two oils have become popular among car owners because they are said to provide better fuel economy and performance. However, not all engine builders agree that using either oil is better than the other.

So what’s the verdict on 5W and 10W oils? Here’s what you need to know.

Difference Between 5W30 and 10W30 oils

Here’s a quick table to easily understand the differences between 5W30 oil and 10W30 oil.

5W30 Oil10W30 Oil
Low-temperature ViscosityHigh-temperature Viscosity
Can work within -30oC to 35oCCan work in a range of -18oC to 30oC.
It’s ideal for private vehicles and light-duty petrol and diesel engines.It provides better lubrication for commercial vehicles and heavy-load engine cars.
It’s better suited for cold weather.It’s better suited for warmer weather.
A comparison table, describing the differences between 5W30 and 1030 oils.

Should I use 5W or 10W oil?

10W30 is a popular choice for most vehicles because it offers good protection against wear and tears while providing sufficient lubrication for most steering and braking systems.

5W oil is a lighter oil than 10W oil and is used in many newer cars. It flows more easily and has a higher temperature range, making it good for use in the summertime. 

10W oil is more common and is used in older cars. It has a higher viscosity and does not flow as easily, but it has a longer life and can withstand higher temperatures.

When it comes to selecting the right oil for your car, there are a few things to keep in mind. The type of engine, the make and model of your car, and the driving style you use are all factors that will determine which oil is best for you. 

Is 10w30 better for high mileage?

a person putting diesel in their tank
Checking your car manual and following the manufacturer’s recommendation can help you figure out the right type of oil for your car.

There are a lot of factors to consider when it comes to what’s the best oil for your car. One important factor is how much mileage your car has on it.

Some people might think that 10w30 is better for high mileage cars, but is that really the case?

There isn’t one definitive answer to this question. In general, using a heavier weight oil like 10w30 can help provide some extra protection for high mileage engines. However, if your car doesn’t have a lot of miles on it, using a heavier-weight oil can do more harm than good.

The best thing to do is consult your car’s owner’s manual and follow the manufacturer’s recommendations. That way, you can be sure you’re using the right type of oil for your car and getting the most out of it.

There is some debate over whether or not 10w30 is the best oil for high-mileage vehicles. Some believe that the oil can help reduce wear and tear on parts, while others believe that it can also reduce engine performance. 

Ultimately, it is up to the individual driver to decide whether or not they think 10w30 is best for their vehicle.

When should I use 10W30 oil?

a person behind a steering wheel
Using heavier oil might cause issues in regions where the temperature frequently falls below freezing.

Engine oil viscosity is typically graded by weight, with lower numbers corresponding to thinner oils and higher numbers corresponding to thicker oils. So 10W30 oil is a type of engine oil that is lighter than most other oils, allowing it to flow more easily at colder temperatures. 

One situation where 10W30 would be an ideal choice is in a car that has high mileage. Cars that have more than 75,000 miles on them often need a thinner oil to help keep everything moving smoothly.

10W30 is perfect for this because it’s thicker than 5W30 but thinner than some of the other options available, and it’s still strong enough to provide adequate protection for the engine. 

Another time when 10W30 would be a good choice is in cold weather. In areas where temperatures regularly drop below freezing, using a thicker oil can lead to problems.

Is 5w30 better for older cars?

To keep an older car running well, it’s important to use the correct type of oil. Many people believe that 5w30 is better for older cars than other weights, like 10w40 or 20w50. 

That being said, there are some good reasons to choose 5w30 instead of 10w40 for an older car. First of all, 5w30 oil has a lower viscosity, meaning it flows more easily at low temperatures. This is important for older engines, which can be more prone to starting problems in cold weather. 

Additionally, 5w30 oil is also less likely to cause sludge build-up in older engines, which can lead to performance problems and engine damage. So if you’re looking for an oil that will help keep your old car running smoothly, 5w30 is a good choice.

However, there are some disadvantages to using a thinner oil like 5w30 in older engines. Thinner oil can cause increased wear on engine parts, leading to shorter engine life. And, because thinner oil flows more quickly than thicker oil, it can be more likely to leak out of the engine over time. 

For these reasons, it’s important to consider the pros and cons of using a 5w30 oil in older engines before making a decision.

Do older engines need thicker oil?

Yes, it’s best to use the 10w30 oil instead of the 5w30. This will help to keep your engine running cooler and longer.

Older engines have more miles on them and generally run hotter than newer engines. This is why using thicker oil in these situations can be important. Thicker oil will help to keep the engine cooler, which can prolong its life.

When it comes to car maintenance, there are a lot of little things that people don’t think about like using the thinner oil in an older engine. This might result in increased wear and a shorter life.

What exactly does 5W30 mean?

a car
The numbers denote the oil’s viscosity, while the W stands for WINTER.

The Society of Automotive Engineers (SAE) has created a numerical code system for determining the viscosity of motor oils. Multigrade oils were created to give protection over a variety of temperatures since the viscosity of oil fluctuates with temperature. This is why something like 5W-30 would appear on the label.

For instance, in a 5W-30, the number that comes before the W indicates the oil’s low-temperature viscosity. The lower the number, the thinner the oil will be, and the better the oil will perform at cold temperatures.

The number that comes after the W indicates how thick the oil is when it is at its typical operating temperature for the engine.

In short, The W stands for WINTER, while the numbers indicate the oil’s viscosity.


In conclusion, 5W 30 oil is better for your car than 10W 30 oil. It has a higher viscosity, meaning it will flow more easily and provide better lubrication. This will result in improved performance and reduced wear and tear on your engine.

While 10W 30 oil is a good option for some vehicles, 5W 30 oil is a better choice for most vehicles. It is important to consult your vehicle’s owner’s manual to determine which weight of oil is recommended.

  • 5W30 and 10W30 oils are both great options for your car, but they have different properties. 
  • 5W30 oil is thinner and flows better at colder temperatures, making it ideal for winter use. 
  • 10W30 oil is a bit thicker and can provide better protection against wear at high temperatures. 
  • The best oil for your car depends on the climate where you live and the type of driving you do.

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