Abstract: Demand of ultra low Sulphur diesel fuel and cost of additives have created interest in fuel additives. Cetane improver (CI) and lubricity additive (LA) are being regularly added in the ultra low Sulphur diesel (ULSD) fuel to meet the requirements of the specification. The additives are always costlier than diesel fuel and the price depends on the performance of additives. Sometimes, additives may have side effects on other properties of fuel. Hence additive’s performance as well as its adverse effect on other properties of fuel are paramount while using additives.