The title of study is Synthesis and characterization of Total Base Number (TBN) for engine oil. The objectives of my book to synthesize and characterize the Total Base Number (TBN) compounds for engine oil. Calcium oleate detergent was prepared by setting eight batches and calcium sulfonate was prepared by setting six batches. These compounds were prepared by applying same method but different quantities of calcium hydroxide were used in all batches. The products were characterized by three parameters such as Basicity test, solubility in engine oil and base oil,determine the Total Base Number value (TBN). The product of these batches was completely soluble in engine oil and base oil and also the product of these batches had almost same experimental and theoretical Total Base Number (TBN) values. The product of all batches of calcium oleate detergent and calcium sulfonate will show better/highest activity due to Total Base Number values (TBN) which matches with the Total Base Number values (TBN) as mentioned in the literature. Hence, therefore all batches product of calcium oleate detergent and batch product of calcium sulfonate were used as an additive for engine oil.