Many readers will be aware that lubricant oils have additives for improved viscosity characteristics. However a wide range of other additives have come into use over the past fifty years and the practising tribologist aiming at improved engine lubrication must solve problems from a wide range of disciplines, including rheology, colloid science, surface science, metallurgy and mechanical engineering.
No takes yet. Share an insight, caveat, or question.
Roy C. Watkins (1984) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: