Sorry, but they're liars.
"Dramatically increases fuel economy" is their first claim, and NOTHING that has ever claimed that has ever been proven true. If it could be proven true it would be the biggest news in decades.
Do I have absolute proof it's a lie? No. But, I'd bet real money that any independent test will prove it a lie - and I don't gamble.
When the first claim of a "product" (read: snake-oil) is an obvious lie, it is only fair to assume that it's all lies.
This line is also so misleading as to pretty much just be a lie:
"Ethanol / E10 fuels increase the amounts of water and sludge in your fuel tank. Star Tron breaks down this excess water and sludge to sub-micron size allowing it to be safely burned away during normal engine operation.
Therefore Star Tron prevents phase separation and fuel gelling, eliminating ethanol fuel problems."
In fact, breaking down water to "sub-micron size" is what ethanol does! The fact that it will go into solution with water is why any alcohol can increase how much water is in your fuel (absorbed in the alcohol). On the other hand, it's ability to absorb water allows it to reduce water that has built up in your tank (through leakage or condensation). "Fuel Dryers" are simply alcohol that absorbs water in your tank and lines, allowing it to be burned up with the fuel (really leave as vapor out your exhaust). DucSculptor's quote of them talking about "Emulsified water/ethanol" is BS too. They're claiming that they're product takes emulsified water and puts it into solution, but it's not in an emulsion, it's a solution to start with. There's no such thing as water/ethanol emulsion in your tank.
The "sludge" part is just all made up. Take a look in your tank and try to find the "sludge."
"Phase Separation" is real. It happens when the alcohol absorbs too much water and then the alcohol/water solution separates from the gasoline. That takes quite a bit of water: about 4 teaspoons per gallon (in E10), or over 1/3 cup water per tank. I have no idea if it does anything for that.
Besides, even if every single one of their claims is true, there is absolutely nothing there that claims it changes the ethanol in any way. They claim to change the water. So, if it is the ethanol that is harming our tanks, there is zero reason to think that this would help in any way.
'Course, no one is certain they know what is making our tanks warp anyway - maybe it's gasoline. Will this take the gasoline out of our gasoline? :think: