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  2. Motor oil - Wikipedia

    en.wikipedia.org/wiki/Motor_oil

    Pouring fresh motor oil into an engine Quart containers of branded bottled motor oil at a store. Motor oil, engine oil, or engine lubricant is any one of various substances used for the lubrication of internal combustion engines.

  3. Eicosapentaenoic acid - Wikipedia

    en.wikipedia.org/wiki/Eicosapentaenoic_acid

    Eicosapentaenoic acid (EPA; also icosapentaenoic acid) is an omega−3 fatty acid.In physiological literature, it is given the name 20:5(n−3).It also has the trivial name timnodonic acid.

  4. Viscosity index - Wikipedia

    en.wikipedia.org/wiki/Viscosity_index

    The viscosity index (VI) is an arbitrary, unit-less measure of a fluid's change in viscosity relative to temperature change. It is mostly used to characterize the viscosity-temperature behavior of lubricating oils.

  5. Boss (engineering) - Wikipedia

    en.wikipedia.org/wiki/Boss_(engineering)

    Two bosses in the form of cylinders on a mechanical part. The cylinder to the right is filleted near its base.. In engineering, a boss is a protruding feature on a workpiece. [1]

  6. Bulk modulus - Wikipedia

    en.wikipedia.org/wiki/Bulk_modulus

    The bulk modulus (which is usually positive) can be formally defined by the equation =, where is pressure, is the initial volume of the substance, and / denotes the derivative of pressure with respect to volume.

  7. Mobil - Wikipedia

    en.wikipedia.org/wiki/Mobil

    Mobil Oil Corporation, now known as just Mobil, is a petroleum brand owned and operated by American oil and gas corporation ExxonMobil, formerly known as Exxon, which took its current name after it and Mobil merged in 1999.

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