Shandong PetroChina Floating Valve Co., Ltd. ... Shandong Heze Meifu engine oil general agent is Shandong PetroChina Floating Valve Co., Ltd., which is the largest engine oil distributor in Heze, Shandong Province, with the latest product inventory and the most favorable price. The company is also committed to providing customers with the most professional consulting services, technical support and technical services, and has become a quality partner trusted by customers.