A lubricant is a substance that reduces friction and wear by providing a protective film between two moving surfaces. Good lubricants possess the properties such as low toxicity, high viscosity index, high load carrying capacity, excellent coefficient of friction, good anti-wear capability, low emission into the environment, high ignition temperature. So tribology related problems can be minimized by proper selection of lubricant from wear consideration. Today, the depletion of reserves of

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... oil, the growing prices of crude oil and concern about protecting the environment against pollution have developed the interest towards environment-friendly lubricants. Because of these the purpose of this work is to evaluate the anti-wear characteristics of cottonseed oil and to check the suitability of cottonseed oil as a lubricant for multi-cylinder engine. Four ball testing machine is used for anti-wear testing as per ASTM D 4172. The wear preventive characteristic of cottonseed oil is obtained by measuring wear scar diameter. The present study shows the potential of cotton seed oil as an alternating lubricant.