Fuel additive recommendation by Cummins

When I bought my 05 Ram Cummins in 07 it had 20k on the odometer. It almost immediately started to randomly have a rough idle at start up. For instance if I would stop at a rest area on the interstate when I refired the engine it would act like a cylinder or two was not functioning properly for about 30 to 50 seconds then it would smooth out. I took it to the dealer and they replaced two injectors. When I jumped in to take it home it did it again!!! The mechanic said it was quit time, bring it in tomorrow or schedule another appointment. I decided to research the problem on the Internet first. A few days later I stopped at Wal Mart for a few things and while I was walking through the auto dept. I noticed Power Service products. Since Wally World does not keep things on the shelf that do not move I guessed this was a good seller....big demand?? I bought a quart, gave a fresh fill up a heavy dose and never, not once, have I experience this problem again. That was 80K miles ago and I use Diesel Kleen every fill up since then.