Shenzhen city's motor vehicle maintenance chain was created in 1993 and has been working for more than two decades on the research and development of dynamic maintenance models for automobiles and engineering machinery. At present, there are numerous motor vehicle maintenance chains throughout the country. Much of the effort has been devoted to the concept of conservation, which has been constantly explored and summed up by the development of a whole new set of technologies - dynamic conservation models. The conservation model integrates more organically different vehicle conditions and conservation process processes, based on the performance of multiple ultra-energy lubricant series. System-wide conservation is also undertaken to avoid short-term effects. To enable vehicles to be structured, functional and operational at or above the design level and to ensure the sound operation of vehicles and engineering machinery at all stages of their life cycle. This new set of conservation a...