The recommended oil change interval for fully synthetic oil is typically every 10,000 to 12,000 kilometres or 12 months, whichever comes first. For example, in congested traffic or frequent short-distance driving (one-way trips less than 8 kilometres), the increased number of cold starts accelerates oil degradation, so It is best to shorten the interval to 7,500-9,000 kilometres or 9-10 months. Turbocharged models, operating in high-temperature and high-pressure environments, require maintenance every 8,000-10,000 kilometres, while extreme climates (sustained high temperatures or extreme cold) necessitate shortening the interval by 20%-30%. Additionally, if the vehicle is parked for extended periods, the oil should be changed every 12 months, even if the mileage threshold has not been reached, to prevent oxidation. Oil condition can be assessed by observing its colour (dark and murky oil requires changing), texture (lack of viscosity or presence of metal particles), or using a test strip (irregular diffusion ring). It is also advisable to replace the oil filter with each oil change. Vehicles equipped with an oil life monitoring system should prioritize its dynamic alerts. For older vehicles (over 5 years or exceeding 100,000 kilometres), using higher viscosity oil and reducing the maintenance interval to 8,000-9,000 kilometres is recommended to accommodate engine aging.
