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Additives added in lub oil and their effects

Antioxidants(in 2s and 4s cc oil): prevent deterioration in use,formation of organic acids.
Detergent-dispersants:prevents the formation of lacqers from combustion residues.
Extreme pressure additives ( gear oil) in near boundary lubrication working range.

anti foam agents: aerated conditions( gear oil, high speed engine oil)
{additives can interact with each other called synergy and antogonism)
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