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SAE J357

Physical and Chemical Properties of Engine Oils

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Organization: SAE
Publication Date: 1 May 1984
Status: inactive
Page Count: 7
scope:

Introduction- This SAE Information Report discusses a number of the physical and chemical properties of new and used engine oils. Where appropriate, standardized methods of test for these properties are listed. This report was prepared to provide those concerned with the design and maintenance of internal combustion engines with information relative to the terms used to describe engine lubricants.

In addition to the basic function of lubrication (reducing friction and wear between moving parts), the oil must also (1) provide a seal between cylinder walls, pistons, and piston rings, (2) dissipate heat from critical areas, (3) neutralize acids formed during combustion, (4) disperse contaminants to prevent accumulation of deposits, (5) protect internal engine parts from rust and corrosion, and (6) control oxidation to prevent excessive viscosity changes. In performing these functions, the oil can be subjected to extreme temperature variations, ranging from below -40°C during shutdown periods in winter to 200°C or higher while the engine is operating. In certain engine configurations, such as turbocharged, hot soak temperatures after shutdown can exceed 350°C in areas where engine oil is present. A wide variety of contaminants may be introduced into the crankcase by way of blow by or fresh-air ventilation. While some contaminants are inert, others are chemically active or can catalyze chemical reactions, some of which may be undesirable.

Document History

January 1, 2016
Physical and Chemical Properties of Engine Oils
This SAE Information Report reviews the various physical and chemical properties of engine oils and provides references to test methods and standards used to measure these properties. It also...
November 1, 2006
Physical and Chemical Properties of Engine Oils
This SAE Information Report reviews the various physical and chemical properties of engine oils and provides references to test methods and standards used to measure these properties. It also...
October 1, 1999
Physical and Chemical Properties of Engine Oils
1. Scope--This SAE Information Report reviews the various physical and chemical properties of engine oils and provides references to test methods and standards used to measure these properties. It...
May 1, 1996
Physical and Chemical Properties of Engine Oils
A description is not available for this item.
February 1, 1995
(R) PHYSICAL AND CHEMICAL PROPERTIES OF ENGINE OILS
This SAE Information Report reviews the various physical and chemical properties of engine oils and provides references to test methods and standards used to measure these properties. It also...
June 18, 1991
(R) PHYSICAL AND CHEMICAL PROPERTIES OF ENGINE OILS
This SAE Information Report reviews the various physical and chemical properties of engine oils and provides references to test methods and standards used to measure these properties. It also...
SAE J357
May 1, 1984
Physical and Chemical Properties of Engine Oils
Introduction- This SAE Information Report discusses a number of the physical and chemical properties of new and used engine oils. Where appropriate, standardized methods of test for these properties...
August 1, 1969
Physical and Chemical Properties of Engine Oils
INTRODUCTION: This Information Report discusses a number of the physical and chemical properties of new and used engine oils. Where appropriate, standardized methods of test for these properties are...
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