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But SAE also allows designating an oil with two viscosity grades, referred to as a multi-grade oil. For example, 10W-30 designates a common multi-grade oil. A 10W-30 oil must pass the SAE J300 viscosity grade requirements for both 10W and 30, and all limitations placed on the viscosity grades, such as the requirement that a 10W oil must fail ...
This is driven by the EPA requirement that the same viscosity grade of oil used in the MPG test must be recommended to the customer. This exclusive recommendation led to the elimination of informative charts depicting climate temperature range along with several corresponding oil viscosity grades being suggested.
where U is the oil's kinematic viscosity at 40 °C (104 °F), Y is the oil's kinematic viscosity at 100 °C (212 °F), and L and H are the viscosities at 40 °C for two hypothetical oils of VI 0 and 100 respectively, having the same viscosity at 100 °C as the oil whose VI we are trying to determine.
A sample of synthetic motor oil Synthetic oil is a lubricant consisting of chemical compounds that are artificially modified or synthesised. Synthetic oil is used as a substitute for petroleum-refined oils when operating in extreme temperature, in metal stamping to provide environmental and other benefits, and to lubricate pendulum clocks .
U.S. Energy Information Administration: World Crude Oil Prices Archived 2008-11-10 at the Wayback Machine; BP Crude Grades; Intertek: Crude Oil Grades and Types; MeGlobalOil: Carriage of Heavy Grade Oil; Statoil.com: Crude oil assays; EnergyIntel.com: The Crude Oils and their Key Characteristics; Capline system crude oil properties and quality ...
Viscosity is a measure of a fluid's rate-dependent resistance to a change in shape or to movement of its ... SAE 10 Motor oil: 0.085 to 0.14 Castor oil: 0.1 SAE 20 ...