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Ain't that the stuff that turned Bruce Banner into the Incredible Hulk? I'd use with caution.
Seriously, never heard of it either. Where can it be purchased? It must be a local thing. Diesel Kleen and Howe's are popular at the truck stops around here.
I did a google search on this product. It looks like the only people who said anything favorable where rather suspicious. They were usually new posters on forums. One of the forum users called them out on it but no reply. I say it is snake oil. Expensive too, $115 a gallon.
I hear ads for it all the time on XM radio.
I have tried similar potions from a small company in a small town in Minn. with no measureable change in fuel economy.
I say, "SNAKE OIL!".