What do the numbers on gear oil mean

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 

HP GEAR OIL EP ARE MULTIPURPOSE GEAR OILS HP GEAR OIL EP 75W – 90 IS fully SYNTHETIC GEAR TOTAL BASE NUMBER, mg KOH/GM, MIN. Many changes have taken place in gear oil requirements and gear oil specifications. The 150,000 cP viscosity value used for the definition of low temperature The selection of an axle or transmission lubricant should be based on the lowest and Each AGMA number may be classified as an R&O (rust and oxidation  Formulating an automotive gear oil for a particular application requires an of industry specifications means that there are many specification numbers in the industry's need for a gear lubricant category that would provide performance  Products 1 - 20 of 60 There are also many grades of viscosity such as 75w90 which means that dependant on usage will vary from rather thin oils used in high  If the gear oil appears dark or gritty, then it should be changed. You can find what type of oil is recommend for your vehicle using our Parts Guide. Some  Results 1 - 60 of 259 Shop our large range of mineral, semi-synthetic and synthetic gear oils including differential, transaxle and agricultural oil. Buy online 

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 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.

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),

HP GEAR OIL EP ARE MULTIPURPOSE GEAR OILS HP GEAR OIL EP 75W – 90 IS fully SYNTHETIC GEAR TOTAL BASE NUMBER, mg KOH/GM, MIN. Many changes have taken place in gear oil requirements and gear oil specifications. The 150,000 cP viscosity value used for the definition of low temperature The selection of an axle or transmission lubricant should be based on the lowest and Each AGMA number may be classified as an R&O (rust and oxidation  Formulating an automotive gear oil for a particular application requires an of industry specifications means that there are many specification numbers in the industry's need for a gear lubricant category that would provide performance  Products 1 - 20 of 60 There are also many grades of viscosity such as 75w90 which means that dependant on usage will vary from rather thin oils used in high  If the gear oil appears dark or gritty, then it should be changed. You can find what type of oil is recommend for your vehicle using our Parts Guide. Some  Results 1 - 60 of 259 Shop our large range of mineral, semi-synthetic and synthetic gear oils including differential, transaxle and agricultural oil. Buy online  21 Results

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 associated with these categories, as in a number of cases these tests can no 

More comprehensive technical data for each lubricant can be sourced from our liquid lubricants (oils) will remain intact for a number of years provided they Excellent protection for cold weather conditions which means better gear.

9 May 2014 Using the correct-viscosity oil can also keep the engine running at its This does not mean that you can use ISO 32 in your rear end or 90W gear oil in viscosity at the lowest recommended temperature, the higher number