Hi Earl, thank you for reaching out! It follows the car's recommended frequency. You can find out when it is time for the next oil change in your vehicle's service booklet. You can also take a look at the owner's manual. It will tell you how often you should change the oil. Many manufacturers specify fixed intervals: For cars, it is about once/twice a year or every 15,000/30,000 kilometers. You can click the link below to order the item while stocks last. Have a good one! https://www.carparts.com/motor-oil/liqui-moly/lqm22186?can=cpab2020_csqa_20240810