At what percentage of remaining oil should it be replaced?

[VonGrant]

Engine oil is generally replaced when 10% remains, which can prevent the oil gauge from not resetting after replacement. Under normal circumstances, semi-synthetic oil can be replaced every 5,000 to 6,500 kilometers; if full synthetic oil is used, it is recommended to replace it every 10,000 kilometers. Steps to replace engine oil: 1. Place an old oil container under the oil pan at the bottom of the vehicle's engine compartment, use a specialized wrench to loosen and remove the oil filter; 2. Slowly loosen the oil pan drain bolt to drain the old oil. After a period of draining, reinstall the drain bolt, but do not overtighten it to avoid damaging the oil pan; 3. Once fully drained, tighten the bolt (not too tight), pour new oil into the engine, and screw on the oil filter.