Oil changes keep your engine running smoothly, but figuring out when to do one can feel confusing. Manufacturers recommend different intervals depending on your vehicle's age, engine type, and the oil you use—and those recommendations have changed over the years. This section covers how to read your owner's manual, understand what those numbers mean, and recognize when your car is telling you it needs fresh oil.
You'll find information about standard intervals for newer vehicles, what older cars typically need, and how your driving habits affect the schedule. These articles also explain the difference between conventional and synthetic oil, how to spot warning signs that you're overdue, and what happens if you go too long between changes.