I think you might mean Techron.  This seems to be one of the fuel additives
of choice for cleaning fuel systems.  Available at most auto-parts
superstores (kind of pricey compared to STP and others).

eric.henning@bailey.com

>Can anyone tell me where I can find the additive "Dextron" (or is it
>Dexatron)?  I have tried several local FLAPS and two do not carry it and
>the other two said, "Huh?  What?"  National parts chains, WallyMart, Bob's
>Bait & Fuel Store?