Mineral based multigrade gasoline engine oil. Property Kinematic viscosity at 104°F (40°C)/100°F (38°C), 45.2, cSt, 228, SSU Viscosity index, 163, 163. Suspension fluids, fork & shock absorber fluids. Motor oils, gear oils, transmission oils, rear drive oils. BMW factory recommendations chart. What about GL4? GL5 Mobil Hydraulic 10W is a high performance hydraulic oil formulated from low and high ambient temperature performance due to high viscosity index. Mobil Hydraulic 10W is compatible with other engine oils in case of unplanned mixtures . Why do you have to change your motor oil on a regular basis? What role does viscosity play in a motor oil? What does a viscosity index number mean? In this lesson, learn more about the viscosity index, its equation and significance. Diagram of Viscous flow and shear stress For example, the viscosity of a lubricating oil at 100 degrees Fahrenheit would be very different than at 200
The viscosity index of an oil is based on its measured viscosity at 100°F (40°C) and 210°F (100°C), which approximate the temperatures present in an engine when it is first turned on, and then after it has warmed up. The smaller the variation, the higher the score on the index.
If it performs like a SAE 0 motor oil at the colder temperature, then it will receive the SAE 0W viscosity grade. Consequently, if the motor oil performs like a SAE 20 motor oil at the reduced temperatures (the scale varies - see the chart), then it will be a SAE 20W motor oil. The viscosity index can be calculated using the following formula: [citation needed] = − − where U is the oil's kinematic viscosity at 40 °C (104 °F), and L and H are values based on the oil's kinematic viscosity at 100 °C (212 °F). The lower this number is, the less viscous your oil will be at low temperatures. For example, a 5W- motor oil will flow better at lower temperatures than a 15W- motor oil. The higher number, following the “w” refers to hot weather viscosity, or how fluid your oil is at hot temperatures. combined with a motor oil increased it’s viscosity index making it possible for a single oil to meet both the low temperature and the high temperature grade specifications. The molecules of these additives unwind as the temperature of the oil increases and slow down the rate at which the oil’s viscosity decreases. The viscosity of an oil is measured by its resistance to flow. 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 oil flows when it is cold, such as at engine start-up.
Other manufacturers recommend the use of only one motor oil viscosity grade. For best engine performance, always follow the manufacturer's recommendations
29 Oct 2012 Viscosity comparison chart Courtesy of Shell Oil. SAE J300 is used to define engine oils, while SAE J306 is used to define drive line (gear) and chassis lubricants. The Viscosity Index is very important in a suspension oil.
Significance of Viscosity Index. What VI tell us SAE Engine Oil Viscosity Classification: SAE J300. What does The above diagram will make the details clear.
CHART 1 Sarnia Refinery Lube Production - Colombian-Webster Crude. April. 1943. TABLE 3 SAE Engine oil viscosity classification (1950).. TABLE 4 improvers are also referred to as Viscosity Index Improvers and Viscosity modifiers. (d). 6, pp. 1763–1767. The behaviour of engine oil is very important. In this paper has been evaluated temperature dependence kinematic viscosity of engine oils in the low temperatures. With the viscosity index improver, The graph in Fig. Index Terms— Activation energy, Arhhinues, Base oil, EPDM, SAE-grade, Viscosity improver, viscosity index. is vital to know whether the lubricating oil, which is a fluid, for each grade was determined from the ASTM blending chart. The original viscosity grades were all mono-grades, e.g. a typical engine oil was a The following chart shows a comparison of different viscosity grades versus show the two types of shear that can occur with viscosity index improvers (VII).
The lower this number is, the less viscous your oil will be at low temperatures. For example, a 5W- motor oil will flow better at lower temperatures than a 15W- motor oil. The higher number, following the “w” refers to hot weather viscosity, or how fluid your oil is at hot temperatures.
The original viscosity grades were all mono-grades, e.g. a typical engine oil was a The following chart shows a comparison of different viscosity grades versus show the two types of shear that can occur with viscosity index improvers (VII). Viscosity index (VI) calculator. KV40 °C cSt (mm²/s). KV100 °C cSt (mm²/s). Viscosity index. Calculate Clear. Kinematic viscosity @ 100ºC calculator. Viscosity HKS engine oils are developed with an idea of that oil is a tuning part to maximize performance of engine. The unique viscosity categorization will effect at Viscosity Modifiers (VMs) are added to base oil to improve the viscosity index. This type of additive enabled the development of multi-grade engine oils in the