No real definite on the Chevron Concentrate in itself....but as far as additive/cleaners go....I've heard mixed reviews. Some say to take a long drive with the cleaner in, and get it out as soon(fast) as possible....before topping off with "pure" gasoline.
Then on the other fence, you got the people that will recommend letting the clean "ease in" i.e.: through daily, day to day driving, whether it be to/from work, errands, etc.....for a slow, and long clean.
Personally, I'd say give Berryman's B-12 Chemtool a try at the track
Though I hear it may raise your octane a little bit.
The only thing that comes to mind, is while "at the track" (or even a nice, long road trip...) will allow for a more complete burn off of the fuel and the cleaner. You won't have to worry about the potential "unburned" gasoline escaping past the pistons, and having adverse affects on your oil as you would in day-to-day errand running, since at the car, the car would be "completely" warmed up, and ready to guzzle down the gas you throw in the tank
This opinion, ofc coming from the side of the fence, of the people who say to plan Fuel Injection doses inline with/prior to an oil change; since the injection cleaner could adversely affect the oil if say, the unburned gasoline/cleaner (solvent) made it's way past the rings and into your engine.