Motor oil viscosity is a common term we need to understand completely, and it refers to the ability of an oil to flow. The ability to flow is most often selected by the Society of Automotive Engineers (SAE) numbers. The numbers are commonly assigned in ranges of 5, 10, 20, 30, 40, and 50. The higher the number, the thicker the oil and vice versa. 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. The first number tells you how viscous the oil is at low temperatures, and the second number tells you how viscous it is at high temperatures, such as those your engine operates at normally. You want your engine oil to be thinner at low temperatures, so your engine has less resistance, and can start warming up properly. The lower the number preceding the W, the lower the temperature for which the oil is rated. Those winter numbers were modified further after a rash of catastrophic engine failures in the early 1980s. Unusually cold weather in the U.S. and Europe caused oil to gel. Oil weight, or viscosity, refers to how thick or thin the oil is. The temperature requirements set for oil by the Society of Automotive Engineers (SAE) is 0 degrees F (low) and 210 degrees F (high). Oils meeting the SAE's low temperature requirements have a "W" after the viscosity rating (example: 10W),
Monograde gear oils are designated by one number (70, 90, 140, 250, etc.). The number indicates a level of the oil viscosity at a particular temperature. The higher the grade number, the higher the oil viscosity.
Numbers you find on different oil cans, such as SAE 30 or SAE 10W-30, are viscosity or weight numbers that indicate the thickness of the oil. The higher the number, the thicker is the oil. As earlier mentioned, SAE stands for Society of Automotive Engineers. 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. Gear oil is a lubricant made specifically for transmissions, transfer cases, and differentials in automobiles, trucks, and other machinery. It is of a high viscosity and usually contains organosulfur compounds. Some modern automatic transaxles (integrated transmission and differential) do not use a heavy oil at all Monograde gear oils are designated by one number (70, 90, 140, 250, etc.). The number indicates a level of the oil viscosity at a particular temperature. The higher the grade number, the higher the oil viscosity. Gear oil is found in transmissions, differentials and other types of gearboxes in automobiles and other machines. Its purpose is to protect and lubricate the gears it surrounds. Gear oil differs from engine oil mainly because of its higher viscosity.
2 Jun 2012 Gear oils should provide reliable, efficient (low friction), low maintenance operation of gears at different speeds, The number indicates a level of the oil viscosity at a particular temperature. The letter “W” means winter.
Bigger numbers mean greater resistance to flow and higher viscosity. Water, for example, has a very low viscosity and it flows quite easily. Molasses, which is thick and goopy, has a very high viscosity. Needless to say, neither one is a good bet as a substitute for motor oil. The SAE defines high temperature oil viscosity at 212 degrees Fahrenheit (which is 100 degrees Celsius), which is the baseline used to approximate the operating temperatures of most vehicles. It is the operating temperature viscosity that is most important. A viscosity “grade” is just like a grade in school that denotes a range of numbers. Numbers you find on different oil cans, such as SAE 30 or SAE 10W-30, are viscosity or weight numbers that indicate the thickness of the oil. The higher the number, the thicker is the oil. As earlier mentioned, SAE stands for Society of Automotive Engineers.
The transmission oils of the class SAE 80W90 from ADDINOL offer the best lubrication for your gearbox. With our Oilfinder you can check whether oil of class SAE 80W90 is suitable for your gearbox. SAE 80W90 meaning The number "90" refers to the kinematic viscosity of the gear oil at 100 °C. This comprises a
Viscosity of these oils is measured at 212 degrees Fahrenheit; higher numbers indicate more viscous oil. Monograde gear oil with a "W" after its number (SAE 70W Gear oil is used as a lubricant between the moving parts of a gear system so that the gears mesh and turn What Do Gear Oil Viscosity Numbers Mean? 2 Jun 2012 Gear oils should provide reliable, efficient (low friction), low maintenance operation of gears at different speeds, The number indicates a level of the oil viscosity at a particular temperature. The letter “W” means winter. 27 Aug 2019 Understand the meaning behind and differences between gear oil grades While this can be found out via Total Lub Advisor or your owner's manual Multigrade SAE gearbox oil grades include two numbers separated by a
Gear oil is found in transmissions, differentials and other types of gearboxes in automobiles and other machines. Its purpose is to protect and lubricate the gears it surrounds. Gear oil differs from engine oil mainly because of its higher viscosity.
The Society of Automotive Engineers (SAE) assigns a viscosity number, or weight, to oil based on its flow at 210 degrees F, which is roughly the standard operating temperature for most motors. The higher the number, the thicker or slower flowing it is, which changes the nature of how it coats internal engine components and protects against heat and friction . Higher viscosity numbers mean a greater resistance to flow and greater friction between the oil and the parts it lubricates. The SAE scale ranges from 5 up to 50, with 50 being the thickest. The optimal viscosity depends on the operating temperature and the engine structure. These numbers refer to viscosity, or thickness, with the lowest numbers representing the thinnest, and therefore the most viscous oil. Also, the “W” stands for “Winter,” and refers to oil that maintains viscosity even in cold winter temperatures. The need for different grades of oil is readily apparent when Bigger numbers mean greater resistance to flow and higher viscosity. Water, for example, has a very low viscosity and it flows quite easily. Molasses, which is thick and goopy, has a very high viscosity. Needless to say, neither one is a good bet as a substitute for motor oil. The SAE defines high temperature oil viscosity at 212 degrees Fahrenheit (which is 100 degrees Celsius), which is the baseline used to approximate the operating temperatures of most vehicles. It is the operating temperature viscosity that is most important. A viscosity “grade” is just like a grade in school that denotes a range of numbers. Numbers you find on different oil cans, such as SAE 30 or SAE 10W-30, are viscosity or weight numbers that indicate the thickness of the oil. The higher the number, the thicker is the oil. As earlier mentioned, SAE stands for Society of Automotive Engineers.