Fuel injection and additives

[skeeattle]

I searched the e70 forums and cant find anything in regards to to my issue so I wanted to start this thread. I have a 2007 e70 with 95k and I get this rough idle, rough shifting so I replaced the spark plugs, air filter, cleaned the MAF, and I still get a rough idle and rough shifting. So on separate fillups I put a bottle of Seafoam, Redline and BG k44 in and every time I put these additives in it ran perfect, like new! but once I refilled the tank without the additives it goes back to it would slowly go back to its rough shifting, rough idle. To clarify, the rough idle isnt that bad but the shifting does get much worse over time. Yes, I did the tranny reset and throttle reset but that only helps temporarily. I am thinking my fuel injectors are he issue. I use premium unleaded, Costco or ARCO or Chevron fuel, but I always use premium unleaded. No codes. Any ideas? Thanks!