The videos were worth downloading, inspite of the time it took. The tests may have been simple tests, but very revealing. It was fascinating to see the difference between the fuel system cleaners!
The Chevron Techron, Neutra, and Lucas seemed to work the same. But personally, I have noticed more improvement in my car with Neutra then with Techron. I have not used Lucas.
I think my fuel injectors had gotten somewhat plugged up. Chevron Techron did not help. What really helped the injectors was Berryman B-12. But I would not want to use Berryman B-12 all the time.
One thing I have noticed with Neutra is that I seem to get much better fuel mileage. And the car runs really good.