The stockings are effectively filtered on the refueling gun

 In some of the less developed areas of traffic, although the use of ordinary gasoline, but some of the gas stations are very uncomfortable people. "Dirty oil" refers to the more colloidal gasoline, adding such a gasoline easily lead to fuel filter plug, fuel injector clogging and fuel spray bad phenomenon, a long time also easy to valve and Combustion chamber to form coke, resulting in the engine is not working properly. So before the trip, it is best to install in the car with a spare oil tank calibration software filled with oil, one to facilitate the highway can not find the gas station when the emergency can also be added to the "dirty oil", the replacement Gasoline filter, let go of "dirty oil" to replace the spare oil.
  In addition, it is best to buy a petrol filter funnel, used to filter impurities when gas station dispenser, if you can not buy gasoline filter funnel to prepare two pairs of stockings on the car, once the last resort in some places where traffic is not developed, Put the stockings on the refueling gun (at least two layers) to effectively filter impurities. However, it is advisable to choose PetroChina or PetroChina's own oil tank monitoring system when refueling in these areas.