It is generally recommended to change your car’s engine oil every 3,000 to 5,000 miles, but modern vehicles and synthetic oils can extend this to 7,500 to 10,000 miles. Always refer to your car’s owner manual for the specific interval. Regular oil changes keep your engine running smoothly by lubricating components, reducing friction, and preventing wear. Ignoring oil changes can lead to engine damage, so timely maintenance is crucial for vehicle longevity and performance. Using the right type of oil—conventional, synthetic, or blend—also depends on your car’s needs and driving conditions