Yeah, the bolded statement from that site is completely bogus.
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Now to specifically answer number 2, what type of fuel drier should I use. My suggestion would be to use Isopropyl Alcohol based fuel line driers. Not that you cannot use Methanol based, but the benefits are better with Isopropyl.
As mentioned above, Ethanol does absorb the water and keep it from freezing. However, the treated water will still sit in the bottom of the tank and accumulate. The Isopropyl additive will act on the water and cause it to become soluble in gas, meaning it will mix with the gas and leave the tank.
So is this one:
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As soon as you switch back to E10 gasoline, Isopropyl based driers should be used to remove any water saturated Ethanol that is remaining in the bottom of the tank.
There is no such thing as water saturated ethanol. Water is completely miscible in ethanol. Once again the only determining factor would be the concentration of alcohol in the gasoline. The guy keeps talking about alcohols being saturated with water which is meaningless.
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Ethanol absorbs water and holds onto it keeping it separate from the gasoline.
No, it isn't separate. It solubilizes the water in gasoline. It is not separate, it is in solution.
Originally Posted By: y_p_w
Most of these products contain either methanol or isopropanol. My understanding is that either is actually more effective as a gas-line antifreeze than ethanol. I've heard the best selling gas line antifreeze in the US is HEET in the yellow bottle, which contains methanol. Then it's ISO-HEET (isopropanol) in the red bottle.
Methanol supposedly goes straight to the bottom, which is beneficial since water is heavier than gasoline.
The biggest issue with methanol is that it corrodes certain metals and plastics that might be in the fuel system. They require a boatload of corrosion inhibitors to make it safe to pour into a gas tank.
Ethanol does help to a point, but apparently serious issues may mean that a methanol or isopropanol based additive is needed to prevent damage.
Here's one shop's take:
http://www.ldgautomotive.com/gas line drier.html