With a tuned pcm, you need to run premium gas, your truck is trying to tell you this because its pinging. Running regular gas with octane booster won`t fix the problem your having at all, not even a little bit. You need to run premium gas all the time.
I have an all stock 08 Dodge Ram 1500, and I used to run regular gas in it all the time, but when they started putting ethanol in the gas my truck started running like crap and had no power. I changed over to premium and got the power back, and it once again is running like it should.
So with your truck having a tuned pcm running it on regular gas would be much worse.