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  2. Royal Purple (lubricant manufacturer) - Wikipedia

    en.wikipedia.org/wiki/Royal_Purple_(lubricant...

    Royal Purple is an American manufacturer which produces lubricants for automotive, industrial, marine, and racing use. It is known primarily for its line of synthetic Royal Purple Motor Oil products used in gasoline and diesel engines.

  3. Avgas - Wikipedia

    en.wikipedia.org/wiki/Avgas

    Avgas is less volatile, with a Reid vapor pressure range of 5.5 to 7 psi, than automotive gasoline, with a range of 8 to 14 psi. A minimum limit ensures adequate volatility for engine starting. The upper limits are related to atmospheric pressure at sea level, 14.7 psi, for motor vehicles and ambient pressure at 22,000 ft, 6.25 psi, for aircraft.

  4. Fuel dye - Wikipedia

    en.wikipedia.org/wiki/Fuel_dye

    Fuel pumps in Ireland, with green gas oil and red kerosene, and notices that it is an offence to use marked fuels in a motor vehicle. After August 2002, all European Union countries became obliged to add about 6 mg/L (0.034 oz/bbl) of Solvent Yellow 124 , a dye with structure similar to Solvent Yellow 56 , to heating fuel.

  5. Shades of purple - Wikipedia

    en.wikipedia.org/wiki/Shades_of_purple

    Shades of purple. There are numerous variations of the color purple, a sampling of which is shown below. In common English usage, purple is a range of hues of color occurring between red and blue. [1] However, the meaning of the term purple is not well defined. There is confusion about the meaning of the terms purple and violet even among ...

  6. Caput mortuum (pigment) - Wikipedia

    en.wikipedia.org/wiki/Caput_mortuum_(pigment)

    Caput mortuum (pigment) Ferric oxide. Caput mortuum ( Latin for 'dead head', and variously spelled caput mortum or caput mortem ), also known as cardinal purple, is the name given to a purple variety of haematite iron oxide pigment, used in oil paints and paper dyes.

  7. Motor oil - Wikipedia

    en.wikipedia.org/wiki/Motor_oil

    Motor oil is a lubricant used in internal combustion engines, which power cars, motorcycles, lawnmowers, engine-generators, and many other machines. In engines, there are parts which move against each other, and the friction between the parts wastes otherwise useful power by converting kinetic energy into heat.