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  2. Viscosity index - Wikipedia

    en.wikipedia.org/wiki/Viscosity_index

    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.

  3. Motor oil - Wikipedia

    en.wikipedia.org/wiki/Motor_oil

    The grades include single grades, such as SAE 30, and also multi-grades such as SAE 15W-30. A multi-grade consists of a winter grade specifying the viscosity at cold temperatures and a non-winter grade specifying the viscosity at operating temperatures. An engine oil using a polymeric viscosity index improver (VII) must be classified as multi ...

  4. SAE J300 - Wikipedia

    en.wikipedia.org/wiki/SAE_J300

    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 the 5W requirements. Viscosity index improvers (VIIs) are special polymer additives added to oil, usually to improve cold weather performance in passenger ...

  5. Lubricant - Wikipedia

    en.wikipedia.org/wiki/Lubricant

    Motor oil, a common lubricant. A lubricant (sometimes shortened to lube) ... Group II – Saturates > 90% and sulfur < 0.03%, and SAE viscosity index of 80 to 120;

  6. Viscosity - Wikipedia

    en.wikipedia.org/wiki/Viscosity

    Viscosity is a measure of a fluid's rate-dependent resistance ... In the automotive industry the viscosity index is used to describe the ... SAE 10 Motor oil: 0.085 ...

  7. Synthetic oil - Wikipedia

    en.wikipedia.org/wiki/Synthetic_oil

    The advantages of using synthetic motor oils include better low-and high-temperature viscosity performance at service temperature extremes, [24] better (higher) Viscosity Index (VI), [25] and chemical and shear stability. [26] This also helps in decreasing the loss due to evaporation.

  8. Naphthenic oil - Wikipedia

    en.wikipedia.org/wiki/Naphthenic_oil

    Viscosity index (ASTM D2270 [11]) is a measure of the extent of viscosity change with temperature; the higher the VI, the less the change. VI is calculated from viscosity measurements at 40°C and 100°C. The viscosities of paraffinic and naphthenic base oils have very different behavior with temperature change.

  9. Calculated Carbon Aromaticity Index - Wikipedia

    en.wikipedia.org/wiki/Calculated_Carbon_Aromati...

    Cetane numbers are tested using a special test engine and the existing engine was not made for residual fuels. For residual fuel oil two other empirical indexes are used: CCAI and Calculated Ignition Index (CII). Both CCAI and CII are calculated from the density and kinematic viscosity of the fuel.

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