Performance features: cleaning oil has a cleaning role, can remove the accumulation of grease and sediment in the engine, make the engine clean, extend the life of the engine methods: 1, remove the old oil. 2. Pour in the cleaning oil (the same amount as the oil) . 3. Keep the engine idle for 10-15 minutes (don't accelerate or you'll wear out the engine) . 4. Replace the oil filter after pumping out the cleaning oil. Refill with new oil. Use Instructions: Please do not put this product in high temperature or direct sunlight exposure, the product used in the vehicle internal complex parts, detailed use please consult professional technicians! If the vehicle has special filling requirements, please refer to the automobile manufacturer's requirements.