Driven oil analysis test kit. If you've been wondering how often you should change your oil, let science help. Oil analysis is the best method to accurately determine appropriate oil and filter service intervals. Joe Gibbs Driven engine oil analysis kits can detect potential problems before catastrophic damage occurs. They provide you with accurate information to diagnose existing and potentially devastating problems. Compared to the cost of premature or disastrous failure, regular oil testing is a cost-effective and sound maintenance practice that can extend the life of your vehicle. Oil sample assessment kits contain sample containers, instructions, registration form, and a pre-paid shipping envelope.