Can I use 0116 and 1512 at the same time?
You can use both products at the same time to a full tank of gas. However, that may be overkill to the need. We suggest you use our #1512 about every other tank full and any time the vehicle will be subjected to severe service such as when pulling or carrying heavy loads or when driving over hilly terrain with several passengers. Use the #0116 about every oil change or when encountering bad gas or water in the gas.