How to Determine When Engine Oil Should Be Changed

[MacJude]

Identifying the right time to change engine oil is as follows: 1. Observe with an oil test paper: Take a small amount of oil from the dipstick and drip it onto the oil test paper, then let it sit overnight, waiting for the oil to fully spread on the paper. If the edges between the oil ring, sediment ring, and diffusion ring on the spread oil are harder, it indicates greater degradation of the oil's performance, and a change is needed. 2. Time: For full synthetic oil, it is recommended to change it every six months or 8,000 kilometers. For semi-synthetic oil, it is advised to change it every 6,500 kilometers or three months.