• 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...
    7 KB (1,041 words) - 09:09, 11 February 2025
  • Thumbnail for Motor oil
    antiwear additives, detergents, dispersants, and, for multi-grade oils, viscosity index improvers.[citation needed] The main function of motor oil is to reduce...
    66 KB (8,807 words) - 04:41, 17 June 2025
  • fluid; density, viscosity, viscosity index (VI), pour point and flash point, and solubility information from aniline point or viscosity-gravity constant...
    12 KB (1,553 words) - 19:07, 26 September 2024
  • Thumbnail for Lubricant
    Additives deliver reduced friction and wear, increased viscosity, improved viscosity index, resistance to corrosion and oxidation, aging or contamination...
    35 KB (4,199 words) - 20:36, 31 May 2025
  • Hydrotreating. Group II+ base oils have a high viscosity index at the higher end of the API Group II range. The viscosity index is 110-115 minimum. Originating in...
    9 KB (1,200 words) - 02:23, 4 May 2025
  • Thumbnail for Viscosity
    Viscosity is a measure of a fluid's rate-dependent resistance to a change in shape or to movement of its neighboring portions relative to one another...
    100 KB (11,467 words) - 19:48, 24 May 2025
  • Thumbnail for Synthetic oil
    motor oils include better low-and high-temperature viscosity performance, better (higher) viscosity index (VI), and chemical and shear stability, while disadvantages...
    19 KB (2,048 words) - 15:40, 16 June 2025
  • Tribology (section Viscosity)
    various lubricants according to their viscosity behavior as a function of temperature, in 1929 the viscosity index (V.I.) was introduced by Dean and Davis...
    58 KB (8,118 words) - 14:58, 23 May 2025
  • computer, sensors and actuators Viscosity index, a measure of how viscosity of a liquid changes with temperature Vulnerability index, a measure of the exposure...
    4 KB (612 words) - 15:24, 29 January 2025
  • Thumbnail for Hydraulic fluid
    hydraulic oil viscosities fall under the ISO VG (Viscosity Grade) classification system, which is based on the oil's kinematic viscosity at 40 °C (104 °F)...
    18 KB (2,007 words) - 13:19, 24 June 2025
  • Thumbnail for Jojoba oil
    oils such as grape seed oil and coconut oil. It has an oxidative stability index of approximately 60, which means that it is more shelf-stable than safflower...
    11 KB (1,086 words) - 10:55, 14 April 2025
  • Thumbnail for Sperm oil
    illuminant for its bright, odorless flame and as a lubricant for its low viscosity and stability. It was supplanted in the late 19th century by less expensive...
    15 KB (1,553 words) - 00:32, 25 May 2025
  • Viscosity depends strongly on temperature. In liquids it usually decreases with increasing temperature, whereas, in most gases, viscosity increases with...
    18 KB (2,253 words) - 15:36, 26 May 2025
  • Thumbnail for Automatic transmission fluid
    surfactants (which protect and clean metal surfaces); kinematic viscosity and viscosity index improvers and modifiers, seal swell additives and agents (which...
    36 KB (3,994 words) - 02:24, 26 May 2025
  • initiative for linking road vehicles to their physical surroundings Viscosity index improver IATA airport code VII: Vinh Airport, located in Vinh, Nghe...
    1 KB (164 words) - 14:54, 22 April 2025
  • Thumbnail for Brake fluid
    over other forms of brake fluid is that silicone has a more stable viscosity index over a wider temperature range. Another property is that it does not...
    20 KB (2,150 words) - 16:07, 24 May 2025
  • Thumbnail for SAE J300
    engine oil viscometrics are the oil's kinematic viscosity, its high temperature-high shear viscosity measured by the tapered bearing simulator, and low...
    16 KB (1,797 words) - 15:26, 18 August 2024
  • Thumbnail for Apparent viscosity
    the apparent viscosity is constant, and equal to the Newtonian viscosity of the fluid, but for non-Newtonian fluids, the apparent viscosity depends on the...
    3 KB (391 words) - 17:19, 19 July 2024
  • Thumbnail for Mooney viscometer
    number proportional with the value of this torque is taken as viscosity index (Mooney viscosity) and is reported in arbitrary Mooney units. The rubber compound...
    5 KB (647 words) - 22:57, 21 March 2025
  • Thumbnail for Liquid
    Liquid (category Viscosity)
    ISBN 978-0-470-11539-8 Zhmud, Boris (2014), "Viscosity Blending Equations" (PDF), Lube-Tech, 93 "Viscosity Index". UK: Anton Paar. Archived from the original...
    60 KB (7,222 words) - 17:59, 23 June 2025
  • Dynamic viscosity is a material property which describes the resistance of a fluid to shearing flows. It corresponds roughly to the intuitive notion of...
    37 KB (2,473 words) - 18:01, 15 June 2025
  • Thumbnail for Melt flow index
    inversely proportional to viscosity of the melt at the conditions of the test, though it should be borne in mind that the viscosity for any such material...
    10 KB (1,276 words) - 03:46, 23 March 2025
  • Thumbnail for Fluid coupling
    a minimum, a motor oil or automatic transmission fluid with a high viscosity index should be used. Fluid couplings can also act as hydrodynamic brakes...
    20 KB (2,093 words) - 20:59, 19 April 2024
  • relative to a new oil. Viscosity modifiers make an oil's viscosity higher at elevated temperatures, improving its viscosity index (VI). This combats the...
    17 KB (1,958 words) - 06:15, 8 July 2024
  • Thumbnail for Ketchup
    Ketchup (section Viscosity)
    the viscosity of the ketchup inside. Another technique involves inverting the bottle and forcefully tapping its upper neck with two fingers (index and...
    36 KB (3,791 words) - 08:04, 23 June 2025
  • describe the viscous stress and the strain rate are related by a constant viscosity tensor that does not depend on the stress state and velocity of the flow...
    21 KB (3,046 words) - 20:32, 26 April 2025
  • Thumbnail for Polyolester
    typically have lower viscosity indexes than polyalkylene glycol (PAG) or poly-alpha-olefin (poly-α-olefin, PAO) oils, and higher viscosity grades are required...
    4 KB (390 words) - 19:22, 28 November 2023
  • Thumbnail for Pennsylvania Grade Crude Oil
    fluorescent. Pennsylvania grade crude oil is thermally stable and has a high viscosity index. It is generally free of asphalt and has only trace amounts of sulfur...
    5 KB (655 words) - 22:43, 22 June 2024
  • medium speed diesel and heavy-duty engines, as well as olefin copolymer viscosity index improvers. Fuel Additives Afton Chemical produces fuel additives for...
    10 KB (866 words) - 15:47, 4 May 2024
  • 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...
    3 KB (446 words) - 03:39, 11 August 2024