This study discussed the concept of optimization and Lean Six Sigma methods. Lean six sigma methods are a management technique that play significant roles in the maintenance, service efficiency, performance and growth of automobile industry in Nigeria. This study confirmed the significant contribution of lean manufacturing, six sigma and the joint relative of lean six sigma methods on the growth of Nigerian automobile industry. Empirically, the contributions of LSS methods were significant on the aggregate and predicted 40% variation in the growth of automobile industry in Nigeria. The study therefore recommended that automobile companies should view this methods a long-term approach not as a quick stick method.