Motor oil | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-10-02

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Motor_oil


00:01:18 1 History
00:02:08 2 Use
00:07:16 3 Non-vehicle motor oils
00:08:53 4 Properties
00:12:04 5 Viscosity grades
00:15:04 5.1 Single-grade
00:17:40 5.2 Multi-grade
00:20:41 6 Standards
00:20:50 6.1 American Petroleum Institute (API)
00:28:47 6.1.1 Motorcycle oil
00:29:22 6.2 ILSAC
00:31:40 6.3 ACEA
00:32:41 6.4 JASO
00:34:22 6.5 ASTM
00:35:29 7 Other additives
00:39:53 8 Environmental effects
00:41:56 9 Synthetic oils
00:45:13 10 Bio-based oils
00:47:18 11 Maintenance
00:53:20 12 Future
00:54:42 13 Re-refined motor oil
00:55:40 14 Packaging
00:57:16 15 See also



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SUMMARY
=======
Motor oil, engine oil, or engine lubricant is any of various substances comprising base oils enhanced with particularly antiwear additive plus detergents, dispersants and, for multi-grade oils viscosity index improvers. Motor oil is used for lubrication of internal combustion engines. The main function of motor oil is to reduce friction and wear on moving parts and to clean the engine from sludge (one of the functions of dispersants) and varnish (detergents). It also neutralizes acids that originate from fuel and from oxidation of the lubricant (detergents), improves sealing of piston rings, and cools the engine by carrying heat away from moving parts.In addition to the basic constituents noted in the preceding paragraph, almost all lubricating oils contain corrosion and oxidation inhibitors. Motor oil may be composed of only a lubricant base stock in the case of non-detergent oil, or a lubricant base stock plus additives to improve the oil's detergency, extreme pressure performance, and ability to inhibit corrosion of engine parts.
Motor oils today are blended using base oils composed of petroleum-based hydrocarbons, polyalphaolefins (PAO) or their mixtures in various proportions, sometimes with up to 20% by weight of esters for better dissolution of additives.