The answer to a lot of these questions is the same: Check your owner’s manual. It should be your car maintenance and operation bible. Don’t make assumptions on the interval based on past experiences or guidance from mechanics who profit from the work, because the timing has evolved over the years.

Many cars, pickups, and SUVs now have service reminder monitors that alert drivers when to change their oil. “These systems typically monitor the number of miles a vehicle has traveled, and they also sense how hard the car is being driven, and adjust accordingly,” Ibbotson says.

Make sure you get your oil change soon after you receive such an alert.