There is no set frequency for how often you should wash your car. The answer depends on your desires, as well as how you take care of your vehicle as a whole. If you have protective measures such as a film and/or ceramic coating, you will not need to wash your vehicle as often. Additionally, if you typically opt for a clay, polish, and wax service, your car should stay clean longer. Based on these features, we recommend a routine of washing your car every one to three weeks for the best longevity.