What Do the Numbers Mean? Most cars and trucks on the road today use multi- grade oil. Both 5w30 and 10w30 are multi-grade products. This means they are  There are two numbers that define the viscosity of an oil. The first number ends with the letter 'W', which stands for Winter. This measurement is related to how an   17 Aug 2018 So you want to topup your car's engine oil and you want to do it yourself Fear not, we're here to talk you through what it all means, in a (mostly) The large numbers on a bottle of oil like 5W30 or 10w40 refer to its viscosity. There are two ways in which oil viscosity is measured: single grade and multi- grade. SAE 30 is a typical single-grade rating. That means that an organization  An engine in a colder climate, where motor oil tends to thicken because of lower temperatures, would benefit from 0W or 5W viscosity. A car in Death Valley  5W-30 oils are recommended for use in all types of modern vehicles, including by automakers over the past four decades for use in many vehicle types - passenger cars, SUVs, light vans and trucks What do the numbers in 5W-30 mean?

The numbers you see on your motor oil can range from 0 to 60 and are determined in laboratory tests by the Society of Automotive Engineers (SAE). These numbers refer to viscosity, or thickness, with the lowest numbers representing the thinnest, and therefore the most viscous oil.

When you shop for motor oils, there are four group numbers as defined by the American Conventional base oils are generally classified as API Group 2, which means they If the vehicle is older, then it will require more frequent oil changes. If we are to understand those signs, it will allow us to use the best oil that is most suitable for our cars. When we purchase a car, the car manufacturer will  Viscosity, by definition, is an oil's resistance to flow and shear. With oil, like syrup, as you increase the temperature, the viscosity lowers, meaning it flows faster, A higher VI oil can only be of benefit to a car owner living in a cold climate in  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 Do the Numbers Mean? Most cars and trucks on the road today use multi- grade oil. Both 5w30 and 10w30 are multi-grade products. This means they are 

There are two numbers that define the viscosity of an oil. The first number ends with the letter 'W', which stands for Winter. This measurement is related to how an   17 Aug 2018 So you want to topup your car's engine oil and you want to do it yourself Fear not, we're here to talk you through what it all means, in a (mostly) The large numbers on a bottle of oil like 5W30 or 10w40 refer to its viscosity. There are two ways in which oil viscosity is measured: single grade and multi- grade. SAE 30 is a typical single-grade rating. That means that an organization  An engine in a colder climate, where motor oil tends to thicken because of lower temperatures, would benefit from 0W or 5W viscosity. A car in Death Valley 

5 Nov 2014 But do we know the meaning of this 20W-40? What The lower the "W" numbers the better the oil's cold temperature/cold start Please check your car manual which motor oil SAE has recommended for your car engine.

The lower the "W" number the better the oil's cold temperature/cold start performance. The 40 in a 10w-40 simply means that the oil must fall within certain viscosity limits at 100°C. This is a fixed limit and all oils that end in 40 must achieve these limits. The short answer: The numbers represent the viscosity of the oil and the W stands for WINTER. The long answer: The Society of Automotive Engineers (SAE) has established a numerical code system for grading motor oils according to their viscosity characteristics. Because the viscosity of oil changes with temperature, This leaves them still wondering what the viscosity numbers really mean on a bottle of motor oil. Simply put, viscosity is the oil's resistance to flow or, for the layman, an oil's speed of flow as measured through a device known as a viscometer. The thicker (higher viscosity) of an oil, the slower it will flow. Motor Oil: What Do Grades Mean For Your Engine. Just like with electricity, when it comes to car oil, numbers matter—especially if you want to protect your engine. Motor Oil Viscosity. Oil “weights” or grades—such as 10W-30—are actually a numerical coding system developed by the Society of Automotive Engineers (SAE) to grade oils

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.

5 Nov 2014 But do we know the meaning of this 20W-40? What The lower the "W" numbers the better the oil's cold temperature/cold start Please check your car manual which motor oil SAE has recommended for your car engine. In cars with restored engines, the use of an engine oil containing some level of detergent will not cause any problems. Non-detergent oils can be used either when  29 Jan 2018 The 5W means that the oil has been tested at colder temperatures and that already deciphered what those numbers in the SAE ratings mean. What is “viscosity” and why does it matter for your engine's oil? Looking at this series of numbers and letters, note that everything to the left of the dash is the For example, a rating of 5W-30 means that the oil will have a viscosity rating of 30   The higher numbers of a gear oil (e.g., 75W-140) do not mean that it has often referred to as the "weight" of a motor oil, and single-grade motor oils are often vehicle is started up, to hot operating temperatures when the vehicle is fully 

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