The anti-counterfeiting identification method of gray shell engine oil adopts anti-counterfeiting label identification. If you remove any drop of water, the word "authentic" disappears. It is recommended to remove the first layer of labels before the water droplets disappear during the test. To the naked eye, it looks like a line in a mirror. The visible lines consist of the words MINIATURE SHELL. The oil shop in the Xijiao store has not been photographed yet. After finding the device in two days, you can identify the anti-counterfeiting method. The picture below is the anti-counterfeiting label of gray shell engine oil. Shell engine oil is the most common brand in China and has the best acceptance. Due to the huge sales volume of foreign petroleum brands in China, corresponding counterfeit Shell petroleum products will naturally appear. Half a year later, the new version of Shell petroleum products will also appear fake and shoddy. Therefore, be sure to pay careful attention to the anti-counterfeiting labels and do not buy fake engine oil. At present, all Shell medium red shell (HX3) yellow shell (including yellow shell HX5HX6) blue shell (HX7) gray shell (including gray shell 5W-40 gray shell AB5W-30) all 4-liter bottle caps have anti-counterfeiting labels, which can be passed Identify. Shell Motor Oil 1L Gray Shell VX Series does not have an anti-counterfeiting label. Please note the difference. Gray shell engine oil mainly has a good quiet effect, so be sure to make sure when buying it. It is best to purchase through formal channels, which will be more secure.