1. Telephone anti-counterfeiting inquiry on the engine oil cap. High-end fakes use real bottle caps. They are bottles that have not been inspected after the genuine engine oil has been used and then the safety bolt is re-welded, so here is There will be traces. Bought here

2. There are burrs on the edge of the bottle safety bolt, which is very rough

3. There will be a series of numbers on the bottle mouth, but there is no one here