As for what they said, last week they introduced it by basically repeating the highlights of what's on the website.
This week they took a V-6 Mustang (previous generation) to represent a "normal" car and a Mercury Marauder as an example of a "performance" car.
Both were run on a chassis dyno to get some baseline horsepower and torque figures.
Next, both were given the TerraClean treatment then run again on the dyno again.
A supposedly independent outfit (First Look?) did the measurements. One shot showed a piece of equipment labeled "PXA-1100 Gas Analyzer". After all was said and done, this is what they said the results were:
Mustang
Before HP 140
After HP 148
Before TQ 192
After TQ 199
Marauder
Before HP 260
After HP 269
Before TQ 274
After TQ 282
1)After the treatment the engines showed "better injector flow patterns".
2) Both the decel and snap-throttle tests showed "dramatic improvements".
3) The combustion balance of both engines before the tests showed "slight variations" and after the tests were "more uniform".
4) During the above claims the camera would pan various printouts, but nothing long enough to be meaningful.
5) Claims of better emissions and gas mileage were made, but no figures given.
6) They said they were going to do mileage testing, and the results would be on the website by now (air date), but I couldn't find anything.
So, if you have SPEED Channel and you'd like to see for yourself, click on the first link above for the program schedule and watch one of the re-airs.