Is Oil Change Based on Time or Mileage?

[DelPhoebe]

Oil change is determined by whichever comes first. If the time interval is reached but the mileage hasn't been achieved, an oil change is still required. Similarly, if the mileage is reached but the time interval hasn't elapsed, an oil change is also necessary. Below is more detailed information about engine oil: 1. Engine oil changes are generally categorized into scheduled changes and condition-based changes. Scheduled changes determine the oil change interval based on either mileage or time. Typically, vehicle manufacturers' maintenance manuals specify the oil change mileage, usually between 8,000 to 10,000 kilometers. Condition-based changes determine the oil change interval based on the degradation of the oil's performance. 2. Engine oil can be classified into different grades based on viscosity and quality. If your vehicle is used in cold regions like Northeast China and has undergone routine maintenance before winter, the oil used is likely a grade that performs well in low temperatures and during cold starts. However, as temperatures rise, switching to an appropriate oil grade ensures the engine operates in optimal condition.