Many newer cars use these algorithms to calculate when your oil should be changed and alert you when it's time. Regardless, it's a good idea to change your oil at least once every 12 months.

The cheapest change in the U.S. involves conventional oil, ranging between $30-$75. Next up is synthetic blend oil, between $40-100. For full synthetic, it's between $65-$100.

I bought an extended warranty on my new 2016 Kia Rio EX because they added “free oil changes for life” to the contract. When I brought it in for the second oil change, they said it had too few ...