Cold honey flows very slowly, but if you put it in the microwave and heat it up, it will flow much more easily. Think of the difference between honey and water. A major difference between the two is simply the addition of a VI additive, which allows the oil to maintain more or less the same flow rate regardless of its operating environment. (Download your own viscosity chart here.) No matter what you call it, the number given defines the thickness of the oil at the standard high temperature.Įngine oil can be either straight weight or a multi-grade viscosity. In the same respect, there are many ways to describe viscosity: engines use the SAE engine chart, industrial equipment mostly uses the ISO chart, gear oils use the SAE gear chart, etc. We can do the low-temp viscosity too, if you’re interested, but the engine spends so little time running at the low-temp viscosity that it’s not a useful test for most people.Īn apple is an apple, no matter what language you use to describe it. At Blackstone we report the high-temp viscosity, which is generally the temperature the engine is at while it’s running and the temperature at which the oil spends most of its time. The viscosity of an oil could be reported at any temperature, but to standardize things, most laboratories report either a low temp (100F or 40C) or a high temp viscosity (212F or 100C) and stick with either Fahrenheit or Celsius. To be more specific, it is the thickness of oil at a given temperature. Commonly, though, we think of it as an oil’s thickness. Technically, viscosity is defined as resistance to flow. We tend to choose an oil with a viscosity that we believe is correct for our particular engine, but would another viscosity improve or reduce the life of the engine? Can we pick and choose a viscosity outside the manufacturer’s recommendations? Viscosity and Flow Friction loss in steel pipes for fluids with viscosities ranging 32 - 80000 SSU.Most of us have only a vague understanding of viscosity. Viscosity - Converter Chart Convert between viscosity units like Centiposes, milliPascal, CentiStokes and SSU.Kinematic Vicosity is a fluid's resistance to flow and can be valued as dynamic (absolute) or kinematic. Threaded Rods - Proof Loads in Metric Units Proof load capacities of metric threaded steel rods.Viscous Liquid Flow Friction loss in schedule 40 steel pipe with viscous liquids - viscosities ranging from water to oil. SAE Multigrade Oils - Viscosities and Densities Viscosities and densities of SAE Grade oils.Oils - Melting points Common oils from animals or plants and their melting points.Oil Lubrication - Temperature Limits Temperature limits for lubricating oils.Motor Oils - Dynamic Viscosities Dynamic viscosities for motor oils SAE 10 to 50 for temperatures ranging 0-100 oC.Liquids - Kinematic Viscosities Kinematic viscosities of some common liquids like motor oil, diesel fuel, peanut oil and many more.suction flow velocities when pumping light oils. Light Oil Suction - Flow Velocities Recommended max.flow velocities on the delivery side when pumping light oils. Light Oil Pumping - Flow Velocities Recommended max.ISO Grade Oils - Viscosities and Densities Viscosities and densities of ISO - and equivalent SAE grade oils.ISO-VG Grade ISO-VG viscosity grades for industrial lubricants. Industrial Lubricants - Viscosities vs.Grease - Temperature Limits Temperature limits for grease - a combination of oil and thickener.Engine & Gear Oil - Recommended Viscosity vs.Dynamic (Absolute) Viscosity - Converting Chart Convert dynamic viscosity values between units like Poiseuille - Poise - centiPoise and more.Temperature and Pressure Online calculator, figures and table showing dynamic and kinematic viscosity of benzene, C 6H 6, at varying temperature and pressure - Imperial and SI Units. Benzene - Dynamic and Kinematic Viscosity vs.Absolute or Dynamic Viscosity Online Converter Convert between dynamic or absolute viscosity units - Poiseuille, Poise, centPoise and more.Viscosities Viscosities of products and chemical species at varying conditions.Involving velocity, pressure, density and temperature as functions of space and time. Fluid Mechanics The study of fluids - liquids and gases.
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