CFI FUEL SYSTEM, INJECTORS, STORAGE,PLUMBING AND OUR CRAPY FUEL THESE DAYS

Race Fuel will go Bad.. Just Normally takes longer..

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If moisture does get absorbed into Ethanol gasoline, the Ethanol becomes less soluble in the gasoline, and will settle out at the bottom of the tank. Not only is this Ethanol+water combination not combustible in the engine, the remaining gasoline sitting above this stuff in the tank has 3-4 octane LESS than it did before the moisture caused the Ethanol to drop out. So the remaining gasoline is also garbage, with an octane (for regular) of maybe 83-84.

As a side note: Ethanol contains 34% less energy/volume, so gasoline with 10% Ethanol will contain about 3.4% less energy than pure gasoline.

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One of the biggest problems with gasohol (Ethanol blended Gasoline) is that it is extremely hygroscopic (the ability to attract water molecules from the surrounding environment and to hold them either through absorption or adsorption.

E-10 Gasohol (Gasoline containing 10% Ethanol) can hold up to 3.8 teaspoons of water in solution in the fuel. This water can lead to corrosion, poor economy, drivability problems, and to phase separation leading to other much more serious problems.

To combat this hygroscopic problem it is vital that storage tanks be purged of all water before any fuel containing Ethanol is added. The use of dispersant additives to deal with any residual water is also beneficial.

Storage tanks will pick up water from condensation of moisture in the air due to the daily changes in temperature. A large storage tank can actually generate anywhere from several ounces to as much as a gallon of water per day. Normally this water would settle to the bottom of the tank; however the Ethanol will pick it up, blend with it, and hold it in suspension.

The addition of a Desiccant type filter in the vent system will dramatically reduce or eliminate this condensation. While this idea is relatively new in the US many other countries mandate the use of these filters to prevent water problems.

It is also vital to regularly check the storage tank with water finding paste to be certain that there is no separated water on the tank bottom. Another advantage to water finding paste is that it will begin to slightly change color or in some cases small colored dots will begin to appear on the paste. This indicates that the fuel mixture is approaching the saturation point where phase separation will happen.

Note: Many of the electronic monitoring systems used for tank water detection may not register properly with Ethanol blended fuels. Also we have seen many instances where the fuel tank sending unit becomes saturated with water and stops functioning properly. When this happens the device will show the last good reading indefinitely.

It should be expected that tanks containing Ethanol will require a significantly higher level of maintenance than those holding regular gasoline or diesel.
For more information on this and other fuel related issues visit: http://www.lcbamarketing.com

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http://www2.highlandstoday.com/content/2008/jun/22/problem-ethanol/

Ethanol Dissolves Plastic
"Ethanol can dissolve some solid materials," says a June 2006 Yamaha advisory to dealers. That includes varnish and rust on steel and corrosion on aluminum tanks. The result is contaminated fuel.

"In some cases, ethanol has been known to dissolve components of the fuel system itself," said Willis.

"Some fuel tanks and fuel lines are made of plastic, and ethanol is eating away at the plastic," said Jimmi Fredricks, service manager at Freedom Marine in Lake Placid. "It turns into a jelly, and when you get to the bottom of the fuel tank, it starts sucking it in."

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