General 4S maintenance cycle is shorter than the give an official, such as engine oil filter, air filter, and other consumable parts replacement cycle than the manufacturers recommended shorter, of which 1 million km oil filter replacement cycle from the manufacturer's suggested relationship to 5000 kilometers, air filter from the manufacturer recommended every 40000 kilometers to replace a relationship to replace every 10000 kilometers. Spark plug, fuel filter, transmission oil and other items of the replacement cycle are shortened. If the 4S shop recommended maintenance cycle table of routine maintenance, traveling 60000 km, Anker Sierra routine maintenance of the total cost will be more than 10000 yuan, than the manufacturers recommended to spend more than a few thousand dollars.
Meiruier filter suggest you  owners can refer to the manufacturers maintenance cycle and  replace the filter, with respect to 4S stores to do the maintenance, a lot cheaper.