There are two main factors to consider when comparing and choosing engine oils: how cold it gets in winter and what the manufacturer recommends for your engine. Ideal for starting engines at low temperatures and effective at high engine temperatures, 5w40 engine oils can be used in most conditions.
What does 5w40 motor oil actually mean?
The ‘W’ stands for ‘winter’, the number before it indicates the viscosity (or thickness) of the oil at low temperatures (hence the W), and the number after it indicates the viscosity at higher temperatures (average 150 ° C) , when the engine is actually running.
5w40 motor oil has a winter viscosity rating of five, which means it is less viscous at very low temperatures, compared to, say, 10w40. It has a hot viscosity grade of 40, which means it is as viscous as 10w40 at high temperatures, but less viscous than oils like 15w50.
Why is the viscosity of motor oil so important?
The viscosity of an oil is its resistance to flow. Oil that is too thick will not flow properly through your engine. Oil that is too thin does not protect moving parts against wear. The viscosity increases as the temperature decreases and decreases as the temperature increases.
When selecting a particular type of engine oil, you have to balance performance and protection. An oil that is more viscous while your engine is running will better protect engine parts. But too thick oil will also slightly impair engine performance. That is why it is important to consult your engine manufacturer about which oil type is exactly suitable.
So do I need 5w40 or 10w40?
The choice between 5w40 motor oil and an alternative like 10w40 depends on the winter temperature in your area. 5w40 is better for starting your engine at low temperatures as it flows more easily at these temperatures. When the engine is running and warm, 5w40 and 10w40 have a high viscosity and equally effectively protect against engine wear.
Solution Oil has the best engine oil for your car
You can order the 5w40 oil from us at any time of the day. If you want more information about the 5w30 oil, check it out in our blog here.