# What Do The Engine Oil Numbers Mean?

1. When it comes to determining the viscosity of an oil, there are two numbers to consider.
2. The first number has the letter ‘W’ at the end of it, which stands for Winter.
3. Specifically, this statistic is related to how an oil flows while it is cold, such as when an engine is first started up.
4. According to the way oil flows at normal engine operating temperatures, the second number is described as
1. You may be acquainted with words such as ″30-weight″ or ″10W-30″ oil, but you may not know what they mean.
2. Those letters and numbers relate to the grade level.
3. The greater the number, the thicker the oil is considered to be.
4. The lower the number, the slimmer the individual.

The flow rate of thinner oils is quicker than the flow rate of thicker oils, therefore engineers build engines to run with a certain grade of oil.

## What do the numbers on motor oil bottles mean?

In most cases, the label of a bottle of motor oil includes two digits separated by the letter W. This is a reference to the viscosity of the oil under cold weather circumstances, as shown by the number preceding the W. The Winter symbol (W) in the motor oil number refers to the upcoming winter season. Consequently, the number preceding the W indicates how viscous oil is in the winter.

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## What do the numbers on the oil pressure gauge mean?

When the temperature is low, the oil viscosity is represented by the number to the left of the letter W. Increasing the temperature of the oil increases the viscosity of the oil, as shown by the number to the right of the W. You have thin oil if the first number is low. If the second number is low, you have thick oil.

## What do the numbers before and after the W in oil mean?

In a nutshell, the numbers before and after the W reflect the viscosity of the liquid. Winter is represented by the letter ″W″ alone. As you may be aware, the viscosity of a fluid refers to its thickness. With regard to motor oil, it refers to its thickness when subjected to a particular set of environmental temperature circumstances.

## What does the second number in motor oil mean?

What Does the Second Number in Oil Mean? What Does the Second Number in Oil Mean? According to the motor oil number, the second digit represents the viscosity of the oil when used under typical operating settings. This is how it works when the temperature reaches a certain point, which is generally about 100 degrees Celsius. The most often encountered types of oil are 5w30 and 10w40.

## Is 5w30 oil thicker than 10w30?

10w30 is more viscous than 5w30, and it is also the thicker of the two fuels in comparison to 5w30. The efficiency of the two oils is also altered as a result of this. Moreover, because 5w30 is less viscous, it is able to reach even the most difficult sections of the engine for lubrication. However, because 10w30 oils are heavier, this is not feasible with them.

## What do the 2 numbers on oil mean?

As you’ve certainly observed, the majority of automotive motor oils are labeled with two digits. It’s important to note that they are multiple-grade oils, which implies they are non-Newtonian fluids. The first number indicates the viscosity of a liquid at low temperatures. The second figure pertains to the viscosity of the fluid at normal operating temperatures for the engine.

## Which is better 5w30 or 5w40?

5w30 may be utilized by a variety of vehicles and in a wide range of temperatures, although it is particularly well suited to colder weather conditions. Often used in higher mileage engines, 5w40 works better in warmer temperatures than conventional oils.

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## Is 5w20 thicker than 5w30?

A. When it comes to higher operating temperature performance, 5W30 motor oil performs somewhat better than 5W-20 motor oil, despite the fact that it is a thicker oil than its counterpart. At higher temperatures, 5W30 motor oil would be more durable and would not break down as quickly as other types of motor oil.

## What happens if you put 10W30 instead of 5W-30?

As long as the chemical compositions of the synthetic oils are the same, they will blend properly. It is thus not an issue to mix 10w30 and 5w30 because one will be topping up while the other is mixing. As a result, blending 5w30 and 10w30 engine oils is not detrimental, as the viscosities of the two oils are quite near to one another.

## What does 10w30 mean?

While engine oil is labeled 10W30, it signifies that the viscosity of the oil is rated at 10W when the engine is cold and 30 when the engine is hot, respectively. This is in contrast to an oil with a viscosity of 5W30, which has a thinner viscosity when the engine is cold and has a viscosity of 5W.

## Can I use 5W 20 instead of 5W-30?

It is not safe to use 5w20 instead of 5w30 in most situations. 5W20 is a thinner oil that is designed for cooler temperatures. If you use 5w20 in warmer temperatures instead of 5w30, you may have to deal with increased friction and more rapid engine wear as a result of the higher temperature. Eventually, the performance and lifetime of your engine will be compromised.

## What 5W-30 oil means?

5w30 motor oil has a winter viscosity grade of five, which means it is less viscous (thick) at very low temperatures as compared to, instance, 10w30. 5w30 motor oil has a winter viscosity grade of five. When heated to high temperatures, it has a hot viscosity grade of 30, indicating that it is less viscous than a conventional motor oil such as 5w50.

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## What happens if I put 5w40 instead of 5w30?

By combining various oils, you will not boost the performance of your engine. When synthetic engine oil is blended with traditional engine oil, the additives may have little or no impact, depending on the circumstances. Adding 1 litre of 5W30 to 5W40 will have no negative impact on the engine as long as the 5W30 and 5W40 are mixed together properly.

## Is it OK to mix 5w30 with 5w40?

You can use a mixture of 5w30 and 5w40, and you won’t notice much of a difference in normal temperatures. However, if you have a high-end, luxury car or performance car, it may be a good idea to use only 5w40, even in emergencies, because it may cause inconsistencies, particularly under load, which can result in unwanted damage.

## Is 5w40 good for summer?

Is it possible to run 5w40 in the summer? The new 5W40 is ideal for summer use, thanks to its excellent cold start specifications and high performance. The amount of soot present and the amount of gasoline diluted will decide how long you can operate without interruption.

## What is the difference between OW 20 and 5W-20?

0W20 is far thinner than 5W-20, and as a result, it is more stable at low temperatures than the latter and flows more easily through important engine components. 5W-20 is a viscosity oil with a considerably higher viscosity and is better suited for regular operating temperatures ranging from -22°F to 68°F.

## Is 5W-30 good for summer?

This flexibility to perform effectively in both summer and winter conditions provides the ease of not needing to alter oil weights in response to the changing seasons. Because of the reduced viscosity of 5w30 oil, it puts less strain on the oil pump and results in improved fuel efficiency.

## Can I put 10W30 instead of 5W20?

Originally Answered: Can I use 10w30 instead of 5w20 in my transmission? This will result in lower mileage and, in most cases, shorter engine life since it will take longer to pump up pressure for your bearings and lifters, and it will not spray your lower cylinders for an additional second or two on each cold start.