HG/T 3343-1985 "Determination of oil resistance of paint films" is a standard issued by the Ministry of Chemical Industry of China to determine the oil resistance performance of paint films. The standard provides three test methods: gasoline resistance measurement method, gasoline pouring method and lubricating oil resistance measurement method. The oil resistance of the paint film is evaluated by immersing or pouring the test plate into the oil product maintained at a certain temperature and observing the change phenomenon on the surface of the paint film. This standard provides a reliable test method and guidance for the evaluation of the oil resistance performance of the paint film in actual use.