How often should engine oil be changed under normal driving conditions?

Under normal driving conditions, changing engine oil every 5,000 to 7,500 miles is widely recommended, and this range is supported by the majority of vehicle manufacturers and industry experts. This recommendation is based on the advancement in engine technology and oil formulations, which have improved significantly over the years.

Regular oil changes within this mileage range help to ensure that the engine runs smoothly by minimizing contaminants and maintaining the oil's effectiveness in lubrication, heat dissipation, and protection against engine wear. Oil can break down over time due to heat, contaminants, and engine operation, so adhering to this interval is crucial for maintaining engine performance and longevity.

Other choices either indicate intervals that are too short, which may lead to unnecessary maintenance costs, or too long, which could risk engine health. Relying solely on the oil light may not provide a reliable indicator for when an oil change is due, as this usually indicates low oil pressure or an issue rather than a routine maintenance schedule. Therefore, the 5,000 to 7,500 miles interval strikes a balance that aligns with general manufacturer guidelines and practical maintenance practices.