1pcs Rayhong Engine Anti-Wear Protectant Rust And Noise Reduction Prolonged Engine Anti-Friction Protectant Our engine anti-wear protectants contain sodium tripolyphosphate and sodium gluconate. It reduces engine noise and vibration， providing a smoother， quieter driving experience that improves comfort. Its use method is very simple: 1. After replacing the new engine oil， start the engine and keep the engine running at full speed for 5 minutes to ensure that the engine reaches the warm state， and then turn off the engine. 2. Pour the whole tank of anti-wear protective agent into the engine oil tank， and run at a total speed of not less than 15 minutes to make it fully mixed. 3. For 6-cylinder engines， it is recommended to add a can of anti-wear protective agent， or add this product according to the proportion of 5% engine oil. 4. It is recommended to add anti-wear protectants every 12，000-15，000 km and use them with new engine oil to ensure the best results. It is specially formulated to protect engine components from rust and corrosion， extend engine life and ensure reliable performance.