Citrus oil is an essential oil present within the rind of wall of a citrus fruits. In contrast to most essential oils, it is extracted as a by product of juice extraction by centrifugation, producing cold pressed oil. It is found in all citrus fruits peels. In the present investigation Orange, Sweet lime and Lemon peels are used for the extraction of citrus oil. India along with Argentina, Brazil, China, Mexico and the United States of America accounts for almost half the citrus fruit production in the world. As Orange, Sweet lime and Lemon are most common citrus fruits with a lot of nutritional value, its juice are most consumed for its dietary benefits during the summer. After extraction of juice, the citrus fruits peels are treated as waste and lead to environmental pollution due to improper disposal which can be used for the extraction of citrus oil. This paper focuses on improved steam distillation, where the peels are preheated before subjecting to distillation. The citrus oil composed of around 94.5% D- limonene which has many applications ranging from food flavouring agents to cosmetics.