The history of elf lubricating oil was traced back to the discovery of the french saint marcet oil field on 14 july 1939. To date, elf's group is the fifth largest global oil and gas producer, operating upstream (prospecting production of crude oil and gas, gas and electricity), downstream (refining and marketing, trade and transport) and chemical industries. The company has been dedicated to milling, energy conservation, emission reduction and environmentally sound research and development of petrochemical products. It has always been committed to good faith, innovation and quality management of products as an important part of its business development strategy. It has made the provision of quality products to consumers a basic requirement of the company. It has targeted every aspect of post-sales services as an operational objective, creating a complete system of research and development, marketing, training and maintenance services. To meet the general needs of the chinese market...