A product review is a tool that helps you to make the right product portfolio decisions. It explains how you can win over your purchase decision, effectively apply it to identify the key features of the products. In e-commerce, product reviews are used on shopping sites to allow customers to rate and comment on products they have purchased, right on the product page. Other consumers can read these when making a purchase decision. Often, many companies include a URL on printed literature to invite customers to review their service after a transaction has been completed. Here, Zulker Naeen is a lubricants oil reviewer. His articles and product reviews are exclusive. Also, he is an enthusiastic campaigner seeking to development of the engine oil market of Bangladesh. He is not an armchair critic rather one of the market insiders of growing automotive sector.