The energy source for the manufacturing and industrial activities the crude oil is a very important. This article has studied on Nifty Auto Index returns on crude oil prices. The study has been envisaged on select 15 automobile companies applying Augmented Dickey-Fuller Test on secondary data for 10 years period. The purpose of the study is to understand whether there is an impact of crude oil prices in the long run and as well to study the movements of the price changes with the strength of their relationship. Appropriate statistics are applied for examination.