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Topic Title: 2011 left over fuel question
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Created On: 06/10/2011 12:10:17 PM

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06/10/2011 12:10:17 PM
DaleHollow Admiral Posts: 606 Joined: 06/27/2007	With non treated gas from 2010 1/4 tank 20 gallons left ,,,,,boat has been out on two outtings an hour/an half drive time fuel used, recomendations............going on an continue to use the remaining fuel. before adding fresh. or B makes no difference wether I add new fuel to the old..... thoughts? ------------------------- "Come OOON Back............
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06/10/2011 12:30:27 PM
OLD HOUSEBOATER Super moderator Posts: 1520 Joined: 10/18/2002	B ------------------------- OLD HOUSEBOATER
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06/10/2011 12:31:17 PM
FranticallyRelaxing Admiral Posts: 370 Joined: 09/10/2006	If it's running okay, then do whatever. The old gas won't cause the new gas to age faster, and the new gas will pretty much negate anything that may be wrong with the old. Personally, I never treat gas, and right now in our Party Cruiser is about 8 gallons of gas left over from 2006 in the generator gas tank, and the genny still fires up and runs normally. Yeah, it smells a bit varnish-ey, but oh well. I'll be adding fresh gas soon, and I won't be siphoning out the old... ------------------------- 1988 SkipperLiner 53x14 1995 Tracker Party Cruiser 32 for sale 2003 Chaparral 260 SSI 2000 Allegro Bus 40' DP
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06/10/2011 01:08:30 PM
EastTNBoater Admiral Posts: 226 Joined: 11/27/2002	I would just add to it. However, do not mix ethanol and non-ethanol. I read an article that explains why. It has to do with the ethanol absorbing water and potentially falling out of suspension at concentrations lower than 10%. Thus leaving you with a ethanol/water layer and a low octane gas layer. Anyway, it seemed counterintuiative, but it made sense in the article.
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06/10/2011 03:48:37 PM
stmbtwle Admiral Posts: 2142 Joined: 04/22/2003	I simply put the new fuel in with the old... so far no problems. Just about all fuel nowadays has ethanol in it, and maybe a certain amount of water too if only from condensation. Deal with it. If you don't have a water-separator fuel filter, then install one. Whining about it will get you exactly nowhere. ------------------------- Willie She's a tired old barge but she's paid for! http://s71.photobucket.com/alb...p;current=ef324993.pbw Edited: 06/10/2011 at 04:39:03 PM by stmbtwle
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06/12/2011 12:50:54 PM
BananaTom Admiral Posts: 968 Joined: 12/05/2006	Ethanol is a big factor these days. I have been to many seminars on this subject. I have learned that they recommend keeping the fuel tanks fuel. Less air space = less condensation. And to change the water separtion filters often, and keep spares on board. Many marinas in my area still offer ethanol free gas i.e. marine grade fuel. So know if you are pumping ethanol. I would not worry about putting new gas onto of the old, within the age range you speak of. ------------------------- Banana Tom
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06/12/2011 12:53:25 PM
BananaTom Admiral Posts: 968 Joined: 12/05/2006	Originally posted by: BananaTom Ethanol is a big factor these days. I have been to many seminars on this subject. I have learned that they recommend keeping the fuel tanks fuel. Less air space = less condensation. Thay also all agree = change the water separtion filters often, and to keep spares on board. They show a display of affected filters at these seminars. Many marinas in my area still offer ethanol free gas i.e. marine grade fuel. So know if you are pumping ethanol. I would not worry about putting new gas onto of the old, within the age range you speak of. ------------------------- Banana Tom
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06/13/2011 12:01:17 PM
EastTNBoater Admiral Posts: 226 Joined: 11/27/2002	All of the gas sold at the marinas on my lake are ethanol free. I am not sure how to test that, but that is what they advertise. What I was stating in a previous post is that mixing ethanol and non-ethanol may cause more problems than using ethanol. We all know that ethanol attracts water, but it will normally stay in suspension and your filters can deal with it. However, under some circumstances when mixing ethanol and non-ethanol gas phase separation can occur and the water/ethanol mix will sink to be bottom of your tank. Again, your filters can try and deal with it. But, the gasoline that is left behind will be of a lower octane rating and could cause you problems. That is the theory. As always, your personal experiences may, and probably will, vary.
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