In the case of motor oil, it is the thickness of the oil under certain temperature conditions. The number to the left of the W refers to the oil viscosity when the temperatures are low. The number to the right of the W refers to the oil viscosity at hotter temperatures. If the first number is low, it means that you have thin oil.
What engine oil numbers mean?
The short answer:The numbers represent the viscosity of the oil and the W stands for WINTER. In a 5W-30 for example, the number before the W describes the viscosity of the oil at low temperatures. The lower the number, the thinner the oil and the better the oil's cold temperature/ cold start performance.
Which oil is thicker 5w30 or 10w40?
Which oil is thicker 5W30 or 10w40? 5w30 is less viscous while 10w40 is more viscous. The 5w30 has a viscosity of 30 at high temperature while a 10w40 has a 40 viscosity at high temperatures. When at high temperatures, the 5w30 oil becomes thinner than the 10w40 oil since 30 is lower as compared to 40.
Is 5w20 thicker than 5w30?
The 30 refers to the viscosity at higher temperatures. So, due to viscosity, 5w20 is a thinner oil during operating temperatures, whereas 5w30 is thicker during operating temperatures.
Related Question what oil numbers mean
Can you put 5W 30 in a car that takes 5W 20?
Due to the increased resistance of the thicker 5W-30 oil, your engine will produce slightly lower fuel economy and horsepower output. You also risk engine damage when using 5W-30 instead of 5W-20, as the internal engine components are specifically designed to be used with 5W-20 motor oil.
Can you mix 5W 20 and 5w30?
You can't mix between regular/synthetic blend/full synthetic but mixing weights, especially if they're by the same manufacturer, is no problem.
Can I put 10w30 instead of 5w20?
Originally Answered: Can I put 10w30 instead of 5w20? You can, but you will get worse mileage, and in most cases shorten the life of your engine, as it will take longer to pump up pressure for your bearings and lifters, and won't spray your lower cylinders for an extra second or so on each cold start.
Which oil is better 10W40 or 20W50?
Is 10w40 good for high mileage? 10W40 is not better than 20W50 for high mileage. The difference between 10w40 and 20w50 is simply that the latter is thicker. As far as gas mileage goes, no oil will improve your gas mileage by changing from 10W40 to 20W50 or vice versa.
Is 10w 40 oil good?
10w40 is better for vehicles that operate at higher temperatures. The increased viscosity of 10w40 is better for higher temperatures. Even at higher temperatures, the 10w40 oil provides enough lubrication to prevent metal-to-metal contact. If you are operating at higher temperatures, then the 10w40 is the best option.
What happens if I put 10w40 instead of 5W40?
SprayShack said: Aslong as its fully synthetic it will be fine. 5w - 40 will be better for colder conditions, 10w is thicker to start with thus doesnt get to places around the engine as quickly as 5w-40, but it all depends on temperature.
Is OW 30 the same as 5w30?
It is same as the case of these two oils; the 5W-30 is thicker than the 0W-30 motor oil. It's the viscosity or “flowability” or thinness of any oil that determines it's fuel economy improvement capacity. The 0W-30 is thinner or less viscous than the 5W-30 which makes it considered as better for saving more.
Is 0w30 better than 0w20?
The 0w30 motor oil tends to offer you faster lubrication at the same time offering you a faster and much more efficient start. Although the 0w20 motor oil offers the same as they are both synthetic motor oil, the 0w30 motor oil tends to offer more.
Is 5w30 OK for my car?
5w30 oil is particularly suitable for cars driving in cold climates. Unlike oils with a higher high temperature rating, such as 10 or 15, 5w30 oil can flow freely enough when the engine is started at low temperatures to coat and protect the engine's internal components.
Can I mix 2 brands of engine oil?
No. Switching brands is not harmful to your engine as long as you choose an oil marked with the API donut of the same level, e.g., API SN. Motor oil manufacturers must meet minimum industry standards for performance and compatibility of the API mark.