How to read oil viscosity numbers
3 Apr 2013 Thinner (Lower Viscosity) oils are assigned a lower number like SAE 10. Multi- Grade Motor Oil. To make things even more confusing we also When you buy engine oil, it's important to know the oil's viscosity, a property The viscosity rating is the number of seconds rounded to the nearest multiple of Understanding viscosity can help reduce wear, improve fuel economy, and the oil is cold, so the numbers after the “W” don't relate to the numbers in front of You will see oil viscosity measurement in lube articles stated in kinematic (kv) and absolute (cSt) terms. These are translated into the easier to understand SAE viscosity numbers you see on an oil bottle. Viscosity Understanding.
Before you can read an oil bottle it helps to understand what all of the abbreviations stand for that you may see posted on a bottle of motor oil. This information will deal specifically with the typical bottle of motor oil you will find at your local auto parts store in the U.S.
Understanding Oil Viscosity. Oil viscosity Oil viscosity is measured and given a number, which some people also refer to as the “weight” (thickness) of the oil. Global site of ENEOS, JAPAN's No.1 Oil Company. Symptoms of engine oil deterioration; Points to choose engine oil; How to read SAE viscosity notation It consists of a large number of rotating and sliding parts for which lubricant is used. Reading the Oil Viscosity. Step 1. Find the motor oil weight on the oil can. This is usually a number code that looks like this: 10W-30. Step 2. Read the viscosity rating. On the pictured oil can, the viscosity is 10W-30. Step 3. Understand the viscosity. The first number in the code is the starting An oil is rated for viscosity by heating it to a specified temperature, and then allowing it to flow out of a specifically sized hole. Its viscosity rating is determined by the length of time it takes to flow out of the hole. If it flows quickly, it gets a low rating. If it flows slowly, it gets a high rating. A viscosity “grade” is just like a grade in school that denotes a range of numbers. For example, an A is a 90-100, a B is an 80-89, etc. Viscosity grades are similar. When you see an oil that’s rated SAE 30, this translates into an engine oil that has a viscosity between 9.3 cSt and 12.5 cSt at 212 degrees F.
The ISO VG refers to the oil’s kinematic viscosity at 40 degrees C. To be categorized at a certain ISO grade, the oil’s viscosity must fall within plus or minus 10 percent of the grade. So for an oil to be classified as ISO 100, the viscosity must fall within 90 to 110 centistokes (cSt).
23 Aug 2011 This is the viscosity of the oil, not the weight or grade as labeled on the oil can. I want to stay away from those numbers as they are confusing.
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2 Feb 2016 Viscosity index is a dimensionless number that represents how the (It also applies to fluids like engine and automatic transmission oils, gear It tracks fuel dilution (%), base number, viscosity @100C and coolant contamination. This report is ideal for fleet engine owners. More Than 3,000 Satisfied
1 Sep 2011 Note: BOV refers to the base oil blend viscosity measured by ASTM D445. Engine Testing permit read across from the tested SAE 5W-30 grade to the base stocks is to be changed in a number of different viscosity grades.
19 Oct 2017 As for viscosity, you'll notice a grade on the bottle, such as 5W30. That first number is temperature compared to zero degrees Fahrenheit, the W 2 Feb 2016 Viscosity index is a dimensionless number that represents how the (It also applies to fluids like engine and automatic transmission oils, gear It tracks fuel dilution (%), base number, viscosity @100C and coolant contamination. This report is ideal for fleet engine owners. More Than 3,000 Satisfied 23 Aug 2011 This is the viscosity of the oil, not the weight or grade as labeled on the oil can. I want to stay away from those numbers as they are confusing.
13 Nov 2017 The third letter 'y' stands for the viscosity number of oil at engine operating temperature. For the sake of understanding take this operating