Difference Between 5W30 and 10W40

Main Difference

The main difference between 5W30 and 10W40 is of viscosity. 5W30 have the viscosity of 5 at low temperature and 30 at high. On the flip side 10W40 have the viscosity of 10 at low temperature and 40 at high.

5W30 vs. 10W40

Motor oil is one of the most essential elements of the vehicle. The motor oil is used to minimize the friction between the engine parts and other working parts of a vehicle. The engine parts rub together could cause wear and tear thus, results in damaging the engine and at last completely seizing it. As friction can be reduced or minimized by lubricating the contacting parts, motor oil is used for that purpose in vehicles. It does not only improve the efficiency and performance of the engine of the vehicle but also helps its parts to avoid friction. The commonly used motor oils are 5w30 and 10w40.

The first value of the oil indicates its viscosity under low-temperature conditions whereas the second value indicates the viscosity of motor oil under a high-temperature condition which usually is 100 degree Celsius. On the basis of their viscosity under various temperature conditions, these mآotor oils are considered different as per their usage.

Comparison Chart

5W3010W40
5w30 is an artificial motor engine oil with a viscosity of 5 at low temperature and 30 and high temperature, which is universally considered as 100 degree Celsius.10w40 is an artificial motor engine oil with a viscosity of 10 at low temperature and 40 and high temperature, which is universally considered as 100 degree Celsius.
Thickness
5w30 is less thin oil as compared to 10w40.10w40 is more thick oil as compare to 5w30.
Viscosity at Low Temperature
Viscosity of 5Viscosity of 10
Viscosity at High Temperature
Viscosity of 30Viscosity of 40
Recommended For
hydraulic tappets-based engines.Engine and vehicle other than hydraulic tappets.

What is 5W30?

5w30 is an artificially developed motor engine oil that has the viscosity of 5 under low-temperature conditions and a viscosity value of 30 under a high temperature that is universally considered as 100 degree Celsius. 5w30 is a less viscous motor oil under low and high temperature both as compared to the 10w40.

The ‘w’ in the name of the oil stands for ‘winter’. As the car is cool down on its startup, 5w30 works at its best lubricating all the engines and maneuvering around the seals very well. But as the car starts to get heat and the temperature rises, the already thin and less viscous 5w30 tend to work less efficiently. 5w30 is recommended for the cars with hydraulic tappets more. 5w30 is more suitable to be used in low-temperature areas and cold region.

What is 10W40?

10w40 is an artificially developed motor engine oil that has the viscosity of 10 under low-temperature conditions and a viscosity value of 40 under a high temperature that is universally considered as 100 degree Celsius. 10w40 is a more viscous motor oil under low and high temperature both as compared to the 5w30. The ‘w’ in the name of the oil stands for ‘winter’.

As the car is cool down on its startup, 5w30 works at its best lubricating all the engines and maneuvering around the seals very well, whereas 10w40 works more efficiently when a car is in motion and has a high temperature. 5w30 is recommended for the cars with hydraulic tappets more, whereas 10w40 is suitable to be used with all the rest sort of engine vehicles. 10w40 is mostly recommended to be used in areas with moderate temperature but it compatible to use with all kinds of heavy engines in any geographical conditions.

Key Differences

  1. 5w30 is the synthetic artificial motor oil with a viscosity of 5 at low temperature and 30 at high temperature i.e. is universally considered as 100 degrees.
  2. 10w40 is the artificially developed motor oil with a viscosity of 10 at low temperature and 40 at high temperature i.e. is universally considered as 100 degrees.
  3. 5w30 is less viscous motor engine oil in both less and high temperature.
  4. 10w40 is more viscous motor engine oil as compare to 5w30 in both less and high temperature.
  5. 5w30 is recommended for vehicles with hydraulic tappets in the engine.
  6. 10w40 is good to be used with all kinds of vehicle engines other than the hydraulic tappets.

Conclusion

5W30 is best for vehicles with hydraulic tappets whereas 10W40 is favorable for all vehicle engines other then hydraulic engines.

Harlon Moss

Harlon currently works as a quality moderator and content writer for Difference Wiki. He graduated from the University of California in 2010 with a degree in Computer Science. Follow him on Twitter @HarlonMoss

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