I noticed the drivers around the developed countries have a common symptom. They go to a garage for an oil change. I won’t say all! Some people search Google for the best-manufactured motor oils and do the oil changes on their own. The engine oils like ‘5W40 VS 5W30’ are a standard comparison. Here we show you ‘Can you use 5W40 instead of 5W30?’

The difference between the 5W30 and 5W40 is identified with their viscosity characteristics. It can be ranging from 0 to 60 (low to high). The motor oils of lower viscosity value are often like water, thin and sleazy. On the other hand, the motor oils of higher viscosity value are glorious, thick, and tacky.

Low vs High Viscosity (Motor Oil)

Low Viscosity Oil

The motor oils with lower viscosity work better in lower temperatures. During the winter, the thin oil helps to reduce the engines, brake, and metal friction. You’ll get the light oil specified with the “W” character that identifies the winter weather.


  • Low viscosity motor oils take less power from your engine
  • It reduces internal drag and fuel use
  • Our research found the oil lowers exhaust emissions
  • Improves engine’s response & consumption level
  • Low viscosity oil saves your trucking expenses

High Viscosity Oil

What about the higher viscosity oil? This kind of oil is used for high temperatures, strength, and loads. As per Salon Auto Sport explanation, the 5W30 has less thickness than a 10W30 during the cold weather. Also, the 5W30 flows out more quickly compared to the 5W40 grade during the hot temperature.


  • The higher viscosities of motor oil works better against wear
  • These types of oils are specified for warm weather
  • We found the thicker oil increases the internal operating temperature
  • It puts strain on your battery & makes a vehicle unable if temperature drops
  • Still, consumer-friendly

5W30 vs. 5W40 Comparison Table

Benefits of 5W30

The best thing about the 5W30 is the multi-grade engine oil. Starting from the five viscosity for the lower temperature, the 5W30 plays a vital role at the 30 viscosity for the higher temperature.

  • Thinner for high temp & thicker for high temp
  • Will be efficient for -30°C to 35°C degrees Celsius
  • 5W30 is the best-suited for diesel and some petrol engines
  • Instant engine operation + startup
  • It meets API SN requirements
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What Is 5w40 Motor Oil?

By popularity, the 5W40 is not very popular like the 5W30 oil grade. Still, this stuff is popular with some specific vehicle types for their praiseworthy features. Undoubtedly, if the 5W40 grade oil is specified for your engine, we recommend using it for better engine protection. You’ll not get them lost in colder environments. These oils conquer the freezing temperatures and revs to life very quickly.

5W40 Major Specifications:

I recommend 5W40 for specific gas-powered engines, American diesel trucks, and European pickup or vehicles. Does your vehicle have a diesel-powered engine? Well, 5W-40 is for you. The major specification of 5W40 is its additional thickness and viscosity than 5W30 motor oil. However, you get such oil compatible with cold and heating temperatures, like thicker in the winter and thinner in the hot summer.

5w40 Motor Oil

Benefits of 5W40:

I want to mention the 5W40 oil is its excellent low temp capability; how quickly a vehicle starts with fast protection is praiseworthy. The high viscosity feature of this stuff ensures overall lubrication for harsh driving conditions. You can save extra pennies using 5W40 as the motor oil has low fuel consumption ability with less hydrocarbon pollution. The 5W-40 has been made to protect your engine and allow interval protection.

  • Compatible with modern, diesel-specified, and SUVs vehicles
  • The less or right amount of fuel consumption
  • Fast engine startup + Long engine life
  • Exceeds the OEM requirements
  • Works in low, average, and high temperature
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What Is the Difference Between 5w30 and 5w40?

So, the 5W30 VS 5W40 is easy to expose and closely similar to faster lubrication to engine and metal parts. The 5W30 motor oil has a smooth effect compared to the 5W40, and it flows through the engine parts more effectively. For the cold temperature, both the 5W30 and 5W40 grade motor oil has the same viscosity, but the difference between the “30” and “40” specifies the lower and higher density for high temperature. In case 5W30 has lower viscosity for the hot running engine.

  • Viscosity

The viscosity rate between the 5W30 and 5W40 is the same at 5 grade. The difference happens in the operating temperatures ’30’ and the ’40’ grade. 5W40 has an efficient and higher viscosity than 5W30, which helps start the engine during the summer temperature and helps thoughtfully running a car.

  • Compatibility

The next difference between 5W30 VS 5W40 is compatibility based on the application. 5W30 is used for a different range of applications and is purchased chiefly during the colder temperature. On the other hand, 5W40 is best-suited for higher mileage engines and functions and often purchased during the hot weather.

  • Temperature range

Even though both 5W30 and 5W40 motor oil has an opportunity for the summer and winter season, they have a difference in use. We recommend using 5W30 ranging from Minus 30 Degree Celsius to 30 Degree Celsius, and the 5W40 can be used from Minus 40 Degree Celsius to 40 degree Celsius.


So, you’ve decided whether 5W30 VS 5W40 is best-suited for your vehicle’s engines. These motor oils are used to minimize engine and metal friction and gradually increase the engine’s lifetime. If you still ask, ‘CAN I USE 5W40 INSTEAD OF 5W30?’ Yes, you can depend on the temperature range. 5W30 and 5W40 oils are mainly used for winter or cold temperature; still, they have thinner quality for the hot temperatures, like 5W30 can be used from -30° to 30° temperature range and 5W40 can be used from -40° to 40° capacity. You can also follow the owner’s manual and choose the oil based on the external temperature, fuel economy, and engine type. Hopefully, you have enjoyed us!