How often should fully synthetic engine oil be changed at the longest?
1 Answers
Fully synthetic engine oil should be changed at the longest once a year or every 10,000 kilometers. Fully synthetic oil performs well and has strong oxidation resistance, so it can be used for a longer period. The replacement interval for semi-synthetic oil is 8 months or 7,500 kilometers, while mineral oil has a service life of only 6 months or 5,000 kilometers. Synthetic oil is manufactured through chemical synthesis, and its composition can be adjusted according to different usage purposes. Engine oil needs to be changed regularly because its performance degrades over time, eventually failing to meet the engine's requirements.