Sorry I don't have an answer for you but I'm sure someone else here will ... please tell us something more about your Ram (what trim , engine , etc ...), so it will be easier for the other member to give you some help.
I used one from a company called Gunk and it is Diesel based actually. Directions are simple. Cover up electrical area's, spray product on a cold engine(never on a hot engine!), let sit for 10 mins, spray product of with light pressure spray of water, start engine up, let run for 10 -15 mins and your done!