Updated at: 14-03-2022 - By: micdot

The viscosity of motor oil can be described in two ways. w in the last of the first number indicates winter. Temperature-controlled oil flow is measured by this device. In a conventional engine, the second number tells you how well your motor oil will flow at operating temperature; a small number means that your motor oil will flow better in your vehicle’s engine. Knowing your motor oil number is critical for accurately determining how much oil to use. Your engine will be able to run cooler if you use heavier motor oil during the hottest months. Motor oil is necessary for many reasons, and we’ll examine the differences and applications of 0w40 and 5w30 in this post. Is it possible to switch from a 0w20 to a 5w30 oil in your vehicle? Continue reading for the rest of the story!

What Is The Difference Between 0w40 And 5w30 Oil?

Different grades and properties are found in each motor oil. Additionally, they differ in terms of viscosity, weather conditions, and fuel efficiency. To help you choose the appropriate motor oil for your car, some characteristics have been provided.

Motor Oil Viscosity

The range of oil flow in your car’s engine can be measured by measuring the viscosity of the oil. During the winter, motor oil with a viscosity of 0w40 has a low viscosity and is therefore easier to flow. The 5w30 isn’t viscosity-friendly in the winter, thus it’s best used in the summer.

Fuel Economy

In terms of fuel efficiency, both 0w40 and 5w30 are the same. Both improve your engine in distinct ways, ensuring that it runs and functions to its best potential. However, you may want to consult your owner’s manual before attempting to change either of these two types of engine oil.

Weather Temperature

Because your car requires zero-weight motor oil in the winter, the 0w40 motor oil is manufactured with a liquid engineer to help it flow more easily. It will guarantee that your car’s engine will run smoothly in the winter. While there are only five weights of 5w30 motor oil that aren’t appropriate for use in the cold season, this oil is appropriate for use in the summer.

Can I Use 0w40 Instead Of 5w30?

As long as you have no choice but to use it for your vehicle. However, before making such a decision, you should familiarize yourself with the contents of your vehicle’s owner’s manual. In other words, don’t utilize 0W40 and 5W30 if they’re not recommended. When utilizing it, however, there are some considerations; for example, if you run out of motor oil and have 0w40 and 5w30 available, you can use them.

Accidentally Used 0w40 Instead Of 5w30: Is It Okay?

As long as you didn’t mean to mistakenly use either of the two, it won’t be a big deal. However, if you have a choice, always use the recommended motor oil for your vehicle’s engine.

0w40 Vs. 5w30 High Mileage

0w40 is superior to 5w30 in terms of mileage. High mileage refers to how many miles a vehicle can go given its age. 5w30, on the other hand, is typically used on older vehicles because they require more support due to their mechanical components. The best thing you can do as a car owner is to consult your owner’s manual for your motor oil specifications, even if 0w40 is the standard for new cars.

Which Is Better, 0w40 Or 5w30 Oil?

The answer to this question is complex and dependent on a variety of circumstances. For instance, a single type of motor oil does not work on all automobiles. It is necessary to use a certain type of motor oil in each engine. As a result, the better the quality of the motor oil you use, the better the outcome. Check your owner’s manual if you have a question or concern regarding your vehicle’s functions.

When should I Use 0w40 And When 5w30?

A 0w40 motor oil has the lowest temperature grade and is designed to flow easily at sub-zero temperatures. However, when your engine is running in the heat of summer, the 5w30 motor oil is ideal for protecting it from deterioration because it runs smoothly in the low temperatures of summer.

0w40 Vs. 5w30 In Toyota

A 5w30 motor oil was recommended by Toyota’s management. There are, however, some motor oils, such as 0W40 and 5W30, that are a good match for 5w30. The first, 0w40, is ideal for temperatures below freezing, whilst the second, 5w30, is best for hot, humid days.

0w40 Vs. 5w30 In Nissan

Nissan’s engine management suggests using 5w30 motor oil to maintain peak performance. However, if the production of 5w30 is running low, you can switch to 0w40 and 5w30 as an option. You should, however, seek the advice of a skilled mechanic first to ensure that you don’t end up damaging your engine.

0w40 Vs. 5w30 In Subaru

Subaru is a well-known automaker. Because of its fame, it also needs a well-known brand of engine oil: 5w30. The engine is it. Its engine is so sensitive that only motor oil will keep it from coming apart. 0w40 and 5w30 synthetic motor oil are the most suitable substitutes for Subaru’s conventional motor oil.

0w40 Vs. 5w30 In Mazda

The recommended motor oil for Mazda’s engine is 5w30. There are several situations in which 5w30 is preferable, such as extended desert rides or when 5w30 isn’t accessible.

0w40 Vs. 5w30 In BMW

The engine components in BMW vehicles are among the finest you’ll find anywhere. However, its owner’s annual BMW car uses just 5w30 engine oil, which is not compatible with this vehicle. As a result, in the winter you can use 0w40 motor oil instead of 5w30 and in the summer you can use 5w40 instead of 0w40.

0w40 Vs. 5w30 In Ford

In their owner’s manual, Ford claimed that 5w30 motor oil is crucial in keeping the engine running smoothly and efficiently. In addition to 5w30, you can use 0w40 in extremely cold temperatures to keep your Ford engine running smoothly.

0w40 Vs. 5w30 In Chevrolet

In order to keep their engines running at their best, Chevrolet automobiles only utilize 5w30 oil. Due to its selfish engine need, they changed it to motor oil friendly. It allows you to switch to 0w40 motor oil, which performs similarly to 5w30 in both hot and cold conditions.

0w40 Vs. 5w30 In Jeep

5w30 motor oil is used in Jeep automobiles. A 5w30 motor oil isn’t always readily available, however. A 0w40 motor oil can also be used in your Jeep vehicle on hot days; this engine can handle it.

0w40 Vs. 5w30 In Volkswagen

5w30 motor oil is the best choice to keep your VW running at its peak performance level. The high temperatures of the summer months, on the other hand, make 0w40 an excellent choice for keeping your cold engine cool.


As a general rule, automobile owners choose to go from 0w40 to 5w30 motor oil. If you swap them both, it’s even more confused. That, however, will not be a problem.

Using the recommended engine oil in your owner’s manual will help you avoid future problems. Using this information, you may be certain you’re using the proper type of motor oil for your vehicle.