Seafoam is great stuff. I havent used it on my Ram yet, but I had an old bronco that had 185k on it, and used seafoam (oil, booster, and fuel tank) man that thing smoked. The neighbors thought my truck was on fire, but I can say for sure that is definately cleaned everything up. so well that i had to do an oil pump change because the stuff it knocked loose in the engine was blocking the oil pump. I dont think the previous owner ever changed the oil in it. but it ran for about 70k after and i changed the motor out. i use it in my fuel every oil change.