| Re: [GMCnet] Fuel filters [message #328077 is a reply to message #328075] |
Tue, 09 January 2018 07:49   |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma:
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Water in fuel is common in these coaches because people park them for extended periods of time (primarily in winter) without the tanks being full. When they are warm, humid air enters the empty space in the tanks. Then as the temperature changes to cold, the humid air inside the tanks condenses moisture on the inside and eventually settles as a liquid on the bottom. If there is ethanol diluted fuel in the tank, then the ethanol will combine with the water on the bottom to make the total amount accumulated there even more.
We use water as a standard check for ethanol on our gasoline at the airport. We put 1 CC of water in an measuring tube and add 5 cc of the suspect gasoline. If it is E-10 the test tube will read 1.5 cc on the bottom of combined water and ethanol and 4.5 cc of gasoline above it. I use a medicine bottle graduated in ounces but the result is the same. In EPA non-attainment areas, the EPA is very strict and the test always comes out at exactly 10%. The EPA allows a 1% variation (9% to 11%). Anything over or under that and the delivery truck driver is subject to a huge fine. In other attainment areas the amount will vary any from 0 to 10 %. I have never seen a reading above 10% except on these ethanol pumps with E-85. With E-15 on the horizon that might change.
Enough of that, this subject is suppose to be about filters and water in tanks.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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