What happens when you add more e10 fuel to e10 with phase seperation?

Chris1956

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Mar 25, 2004
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Ok, lets say you have a gallon of 10% Alcohol-gasoline mix, and it gets enough water into it to turn cloudy. Now you mix it with 10 gal of e10 without any water it. Does the cloudiness lesson? Will the water be absorbed by the rest of the e10?

Anybody ever done this experiment?
 

ondarvr

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Apr 6, 2005
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Re: What happens when you add more e10 fuel to e10 with phase seperation?

Adding more will help, being cloudy isn't actually phase separation though, P/S is when the water and alcohol separate out and become a separate layer of liquid.

It would be better to get rid of any cloudy fuel though.
 

Bob_VT

Moderator & Unofficial iBoats Historian
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May 19, 2001
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Re: What happens when you add more e10 fuel to e10 with phase seperation?

Chris...... it's a math problem.

Lets say the original gallon has 10% pure water (numbers just for examples)...... you have 90% gas and 10% water. This would equate to 12.8 oz of water

Add in 10 gallons of gas (W/o water) and then add in the extra gallon you will end up with 1408 oz total of that 12.8 would be water which would equal less than 2% water.

Never did the experiment but the gas / water would separate fast.....

1408 oz of gas = 14.08 alcohol oz which would act as dry gas when they are mixed and the water would be burned away. It might reduce the octane rating less than a point.
 

dingbat

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Nov 20, 2001
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Re: What happens when you add more e10 fuel to e10 with phase seperation?

As Bob_VT noted its a math problem.

Problem is, as I learned last Spring, if you have water in suspension chances are pretty good that you have phase on the bottom of the tank.

I always kept my tanks ? full (92 gallon tanks) and turned the fuel over on almost a daily basis to keep freash fuel in the mix. I never had any issues until I got a dose of water from a local service station. Hit me on the way out of the inlet. We managed to get back to the dock where we siphoned a gallon of water/ alcohol off the bottom of the tank using the primer bulb as a siphon.

From that point on I fought hazy gas issues. I wasn't piucking up any water via the primer vlave so I decided to pull the fuel sensor and take a look. Ended up suctioning another a ? gallon of waterand alcohol off the bottom of the tank which solved the hazy fuel issue once and for all.
 
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