What is the difference between 5w 30 and 5w 40 engine oil?

5w30 is engine oil that has lower viscosity 5 and higher viscosity 30. 5w40 is engine oil that indicates the weight and viscosity of the engine. Its lower viscosity is 5 and higher viscosity is 40. … 5w40 has higher viscosity hence it is not suitable at all temperatures.

Which oil is better 5w30 or 5w40?

5w30 can be used by different type of vehicles and in different range of temperatures, but is ideal for colder temperatures. 5w40 is often used in higher mileage engine sand performs better in warmer temperatures.

Is 5w30 or 40 better?

In practice, this means that each oil is just as viscous at lower temperatures and will remain viscous at -30°C, however 5w40 oil outperforms 5w30 oils at higher temperatures, being effective up to ambient temperatures of 50°C, as opposed to 30°C.

Is it OK to use 5w40 instead of 5w30?

Can you put 5W 40 oil in a 5W30 engine? Yes, but its always better to use manufacturer recommended oil grade. A manufacturer can deny warranty claimes because of wrong grade oil. The 5w40 is slightly thicker at operating temperature but pretty much the same thickness when cold.

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What is 5W 40 oil used for?

The 5w40 is crude-based motor oil that is best fit for diesel and gasoline engines. This motor oil is usually used for cars that are under warranty. Here are some important features of this category of oil: Suitable for vehicles that use unleaded and leaded gasoline.

When should I use 5w30 oil?

Uses of 5w30

5w30 is used in light-duty diesel engines, light-duty petrol engines, and automotive gasoline engines. 5w30 engine oil is preferred for engines working in cold climates, as it gives good flow at lower temperatures.

Can I put 5w40 in my BMW?

BMW says you can use an: 0w40, 0w30, 5w30 or a 5w40 LL-1 oil in the USA. Btw… you can also use a LL-4 rated oil where a LL-1 oil is spec’d, but not vice versa! Maybe who ever changed you oil put too much oil in the engine.

Can I mix 5w30 with 10w40?

As posted above, mixing 5w30 with 10w40 will give you an oil that performs somewhat better in the cold than 10w40, but less good cold than 5w30, and that has a viscosity a bit higher than 5w30 but a bit lower than 10w40.

Can I put 10w40 instead of 5w30?

The recommended oil viscosity for your vehicle, according to Kia documentation, is 10W-40. If you drive the vehicle in exceptionally cold weather, well below 32 degrees, you can use 5W-30 oil but even 10W-40 is still perfectly OK to use if outdoor temperatures are below freezing.

What does 5W 40 mean?

What does 5w40 mean? 5w40 is the grade of the oil. The ‘W’ in the oil grade stands for winter. … The hot viscosity of 40 indicates that the oil is less viscous than other oils such as 15w50 at higher operational temperatures.

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What happens if you use the wrong oil in your car?

You might notice a few oil spot in your garage or under your car because using the wrong oil can lead to leaks, or you might become aware of a burning smell while driving. If the oil isn’t working as it should engine parts might not be lubricated well enough and cause friction, which can burn the oil.

Is it OK to mix old and new oil?

3 Answers. Mixing new with the old will cause you absolutely no issues. As long as you are using the same weight oil, it will mix up and you’d never know it. Continue to change your oil at the specified interval and you should be golden.

Can I put 5w 40 in my car?

5w40 is better for starting your engine at low temperatures as it flows more easily in this environment. When the engine is running and hot, the differences are negligible; 5w40 and 10w40 both have high viscosities and are equally effective in protecting against engine wear.

What is 5W 30 oil used for?

5w30 oil is one of the most commonly used motor oils because it is suitable for a wide variety of vehicles and engine types. 5w30’s viscosity range means it can lubricate, seal, and protect an engine’s internal components in a range of climate conditions.

Can I use 10w 40 instead of 5w40?

10w40 is thicker than 5w40, ONLY when cold. At operating temperature it is exactly the same. Multi-viscosity oils with a lower W number are specifically designed to flow better, and thus lubricate better, at very low temperatures. There is no need to use a 5w-40 if the vehicle only requires 10w-40.

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Is 5W-40 synthetic oil?

Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil (1-Gallon, Case of 3) Shell Rotella T6 is a state-of-the-art, fully synthetic motor oil blend that’s formulated to improve fuel economy up to 1.5 times its usual level.

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