The bottle mouth of Castrol will have a unique anti-counterfeiting label, and the knife edge will be damaged after the real anti-counterfeiting label is removed, while the knife edge will remain intact after the counterfeit product is removed. You can log in to Castrol www.castrol.com/cn official website to confirm the authenticity. The anti-counterfeiting telephone number of Castrol is 40088 123 15.

Here are some tips for buying oil online, hoping to help users buy oil.

1. Try to choose the regular products of large-scale e-commerce as the purchase channel, and it is best to have the authorized sales certificate of the oil manufacturer. Don't choose some cheap products for the sake of cheapness. Generally speaking, there is a great possibility that cheap products are counterfeit.

2. Even if you buy engine oil through formal channels, you should identify the authenticity through the outer packaging when receiving the goods, and remember to issue an invoice. In case you buy a counterfeit product, you can seek to return it or compensate for the loss based on the invoice.

3. After changing the oil, remember to always pay attention to the temperature of the oil and the power of the engine. Once there is any abnormality, check the oil pollution after stopping and cooling, and judge whether to use inferior low-grade engine oil. Non-high-quality engine oil can only be identified after long-term use.