Got a few of the CEM products the other day. Bought the FTC Decarbonizer, Cleanpower Fuel treatment, Antiwear Lubricant Assistant & the Oil Flush Concentrate.
So earlier today I put a dose of the FTC & Cleanpower into the tank (well the correct amount for the amount of remaining fuel), & a dose of the Antiwear into the engine, then took it for a run.
After it had warmed up & on the way out of town, it drove the same as it has done since I got it. Understandable as the products I'd added hadn't had time to do anything.
After about 15 kms, I started to notice a difference in the engine noise. It was quieter, so I let it slow down to about 80 kph, then put my foot down to bring it back up to 100 kph. Definately noticed it is not as loud as before, & the response is better. Turned around a couple of more Ks down the road, & yes, definately quieter, it's revving more freely & even better, it isn't blowing anywhere near as much black smoke as before.

The black smoke is also not appearing until the throttle pedal is closer to the floor. YAY

Now there's only the Oil Flush Concentrate to go, but after reading a few older posts about it & what it can do to higher Km engines (about 340K on mine?) I think I'll either give it a miss, or just use it sparingly (like 1/4 dosage) & do a few quick turnaround oil changes instead.