5w30 and 5w40 motor oils have the number 5 which is then followed by W, representing “winter”.


. The kinematic viscosity of the 5w30 type is between 9.


As a result we can say that 5w30 oils are better than 5w40 when it comes to smooth lubrication.

To decide which type of oil is best for your vehicle, here are some key differences mentioned below: 1. . joelselman.

In high temperatures, the 5w40 motor oil and the 0w40 motor oil will have the same viscosity.

5w40 is suitable for starting your engine at low temperatures. . .

#3. Although the 5W40 behaves like five-rated single-grade engine oil in winter conditions, it doesn’t become thinner than the 40-rated single-grade engine oil when the temperature is high.


5W-30 oil is primarily a winter viscosity grade motor oil.

To decide which type of oil is best for your vehicle, here are some key differences mentioned below: 1. As we can see, the indicators for the cold period in both oils are identical, indicating that both.

. Feb 10, 2023 · 5w30 is better for use in cold weather, while 5w40 is better for use in hot weather.

Living in Az, I actually use a full synthetic 5w50.
5W40 engine oil offers a higher viscosity at operating temperatures compared to 5W30, making it a popular choice for high-performance and high-mileage vehicles.

· #3 · Mar 3, 2018.

May 10, 2022 · But 5w-40 outmatches 5w-30 in hot extreme weather.

Mar 16, 2023 · 5W40 Engine Oil: The High-Viscosity Alternative. As a result, it is more efficient than 5W30, which helps start the engine during the summer and more careful driving. Reply.

Is 5W50 or 5W40 Better for Winter? Both 5W-40 and 5W-50 are similar weight oil in low temperature and have the 5W viscosity which comes to be useful in winter for an engine. . . 5 mm2/s range; the dynamic viscosity is 2. The 5w40 will be thicker when warm. .

5w40 has higher viscosity hence it is not suitable at all temperatures.

Full synthetic also tends to flow more freely when cold. 7 min Read time.


Apr 20, 2021 · 5W-30 Oil vs.


Nov 27, 2022 · Specifically, 5w30 oil has a winter viscosity from 9.

The 5w40 is a much better performer in summer because when the temperatures get boiling hot.