Hello all, first time posting. I have a 2014 Kia optima ex. It just hit 75k and haven't really done any major maintenance besides all the recall. So I recently purchased something call the CRC GDI service kit. It contains 5 bottles inside. A Tank power renew, GDI ITV, Mass airflow sensor, Throttle body cleaner, and a friction guard for oil. Also a set of new spark plugs. I'm wonder is there a certain step I have to do in an order. And if anyone know how to use any of the product?