Lucas Oil Additive
Read your owners manual, I'm certain they say NOT to use oil additives. I have used some of the many gas additives for fuel injector cleansing when needed--particularly in my Jeep Grand Cherokee Limited 5.2 V 8 engine. When it starts mis-firing during a cold engine warmup it's time for some gas additive.
Both of our Crossfires have under 3000 miles on them and run well so no gas additive needed yet, maybe never?
Jim