I used sea foam on our 2006 T&C years ago. It burned some oil so I thought hey why not it shouldn't hurt. WOW, what a smoke show as it ran in the driveway... It seemed to clean the engine up fairly good. Oil consumption was not a lot different post treatment. The one thing that I did notice and not sure if it is related is that the catalytic convertor plugged up on this vehicle some time later. This was the downfall to the vehicle as we were just starting out on an 1,800 mile road trip. On our way back home the engine would not go over 3,000 RPM no matter what I did. I have good reason to believe I burnt the exhaust valves in the engine and the oil use skyrocketed after this episode. About 2 or 3 years later we traded it on a new T&C. Near the end this thing was using a quart of oil in about 500 miles....
I would say use any of these types of treatments at your own risk. Again not sure if the 2 are related but it sure seems like it...
Just my $0.02