Difference Between 5w20 and 5w30 (With Table)

You can expect your automobile to last long if you choose the proper engine oil and drive it in the right weather conditions. Unfortunately, many automobile owners mistake ignoring to address this issue, resulting in their vehicle breaking down sooner than intended. Either the individual changes the engine oil, or a professional mechanic changes the engine oil. However, understanding what to use and when in this sector is critical knowledge.

You may have heard the terms 5w20, and 5w30 referred to in the automobile industry. In particular, they are well-known in the engine oil industry for their high quality and performance. They play an essential function in the overall health of our vehicle and engine. When taking care of your automobile yourself or getting someone else to handle it, understanding which one to use and the distinctions between them can be beneficial.

5w20 vs 5w30

The main difference between 5w20 and 5w30 is that 5w20 is used in more relaxed areas because it is less dense & flows more quickly. On the other hand, 5w30 is primarily used in summer or hot temperatures because it flows more slowly.

5w20 is a typical engine oil type well suited for use in colder locations. Immediately before, the “W” refers to the dense grade of the oils in winter (W). In contrast, the number “20” immediately after the “W” refers to a 20 weights oil in hotter temperatures.

5w30 is the best lubricating oil at hotter temperatures than the 5w20, which is invalid. A greater viscosity — that is, a thicker consistency – distinguishes this oil type from others. It encounters a great deal of friction and much more drag when it flows. Consequently, in colder areas, it takes longer to oil the engine components.

Comparison Table Between 5w20 and 5w30

Parameters of Comparison5w205w30
Viscosity5w20 has a lower viscosity than 5w30. Initially, it has a lower density.When compared to 5w20, 5w30 has a higher viscosity. Initially, it was thicker and denser.
Friction5w20 creates less conflict than 5w30 and vice versa.When comparing 5w30 to 5w20, there is more friction created.
Suitable climate5w20 is more suited for use in colder climates than 10w30.In warm climates, 5w30 is the best choice.
Thickness5w20 is significantly thinner than 5w30.5w30 has a higher viscosity than 5w20.
Flow5w20 has a faster flow rate than 5w30.5w30 has a slower flow rate than 5w20.

What is 5w20?

5w20 is one of the best engine oils available, and it is particularly well suited for use during the cold or winter months. It is important to note that the number 5 represents the viscosity rating, while the number 20 represents the weight of other oils that have been stored at a hotter temperature. So said, 5w20 oil provides engine lubrication in a manner comparable to that of any other oil with the same particle weight. Because it is lighter, it is more effective at lubricating deeper into the engine and its components, which is critical during the cold season. Having a faster flow rate than the 5w30, 5w20 is advantageous in chilly climates.

Typically, winter seasons or colder climates necessitate engine oil, which aids in the lubrication of various engine components more quickly. 5w20 is particularly popular during the winter since it is thin, which is why. 5w20 is also more efficient in the winter because it has a lower viscosity than 5w30. As a result, the fuel service has vastly improved, and the vehicle’s performance is outstanding.

The drawbacks of using oil become apparent when the weather returns to normal or becomes too hot. The lower viscosity begins to have negative consequences, and the thinner oil begins to run out. In addition, the engine’s internal components may become exposed because the oil is depleted, increasing the likelihood of wear and tear.

What is 5w30?

5w30 is one of the best engine oils available, and it is best suited for use in mild or warm conditions. It is indicated by a number between 5 and 30, with 5 denoting the viscosity rating and 30 representing the weight of other oils stored in hotter regions. It is a heavy oil with a higher viscosity as compared to 5w20. As a result, it creates greater friction and flows more slowly, dragging more heavily.

When used in normal operating conditions or throughout the summer, 5w30 is preferable to 5w20 compared to other oil types. Because it is viscous, it is thicker than 5w20 and provides better protection for the engine. In addition, because the oil is thick, it does not run out, and, as a result, the engine’s internal parts are not exposed to the elements.

It is not recommended for use in colder locations because it takes a long time to lubricate the entire engine. Generally speaking, engine oil as thick as 5w30 is not recommended in colder climates or winter. For this reason, the fuel will have a lower efficiency than usual.

Main Differences Between 5w20 and 5w30

  1. In comparison to 5w30, 5w20 has less viscosity and hence moves more quickly through the system. As a result, 5w30 takes longer to flow than 5w20.
  2. The viscosity of 5w20 makes it ideal for usage in frigid climates or the dead of winter. 5w30, on the other hand, is more suitable for hot climates or summer months, and it can also be used in a typical operating environment.
  3. 5w20 performs admirably in more excellent areas. In colder climates, 5w30 can’t match the performance of 5w20, but the efficiency of the fuel is greater, and the fuel’s efficiency likewise decreases.
  4. Use 5w20 in the winter to get your car or engine up and run faster. However, your engine will take longer to start or respond if you use 5w30 in the cold.
  5. When the engine is cold, 5w20, lower friction, aids in speedier lubrication; for this reason, it’s utilized in the winter to lubricate the machine, and summer is the best season to use 5w30. To keep the engine cool, it’s covered in a thick layer.


The engine oil grades 5w20 & 5w30 are both well-known for their performance. Their working hours, on the other hand, are a bit different. 5w20 is the most excellent choice; 5w30 is the finest choice during the summer. Compared to other oils, 5w20 is less viscous & helps to lubricate the engine more quickly, essential during the winter. 5w30, on the other hand, is a thick oil that flows slowly & is more viscous. As a result, it takes a long time to grease the engine, which is necessary during the summer months because of the heat.


  1. https://www.sciencedirect.com/science/article/pii/S0301679X14002199
  2. https://www.sciencedirect.com/science/article/pii/S0301679X14002199