Ok, we have Seafoam, Berrymans, and 44K...but how about Startron?
I have a freind who swears by this stuff...says it has increased the mileage on his ElectraGlide from about 36 to about 39 mpg...a bit more power, and he's only adding a small amount out of a syringe to the fuel tank. One ounce treats 6 gallons of gas.
http://mystarbrite.com/startron//content/view/35/47/lang,en/
http://mystarbrite.com/startron//images/stories/product/family/family-gas-200.jpg
Anyone tried it yet?