How often should you change your oil? It depends on many factors, including the way you drive, how old your engine is and where you live. Many mechanics recommend an oil change every 3,000 miles. Auto manufacturers might suggest a longer interval. For most people an oil change every 5,000 would probably be just fine. However, if you drive at high speeds, have an older car or live where it's hot, cold or dusty, you may consider changing your oil more often. Let our expert staff answer your questions about oil changes.