For those of you looking for ethanol-free gas I found this site that you may be interested in:
http://pure-gas.org/
There is a link there to a petition:
https://petitions.whitehouse.gov/pet...lable/lhq1qgW4
They have a long way to go so pass it on if you like
Thanks
Oh Brother.........Honestly there are worse things ( from your fuel systems perspective ) they are putting in automotive fuel than the ethanol......they just dont get any attention.Originally Posted by lost in time
Petitioning the White House will get as much response as whistling in the wind. These web based petitions are most frequently just a ruse to get your email address so you can be deluged with spam....
Cheers,
Jerry
NC22375
65LA out of 07N Pennsylvania
This link works as well for finding mogas: http://www.flyunleaded.com/airports.php
Hi Aaron,
I wonder about this, too. Visiting the http://pure-gas.org website shows that a significant portion of the population has access to EtOH-free gasoline. It would be very useful to the membership if EAA revisited its use in small Continentals and Lycomings. Heck, a lot of these engines were designed for 73 (!) octane.
Regardless, what are the parts of the fuel systems that need attention, that are harmed beyond what EtOH does? Because I agree with you; there's lots of potentially harmful things in modern mogas beyond EtOH.
Thanks,
Jeff
I'm not sure what you're asking, Jeff. Revisited what use in small Continentals and Lycomings? The EAA already does 4 cyl stc's for non-EtOH gas. Petersen even does some six cyls.
The best info I've seen on the perils of EtOH in airplane engines is the guys who are burning it in the RVs. The injected engines aren't too bad once you're careful with the fuel lines etc...
However, they've had real serious reliability issues with EtOH and carbs.
I was unaware of that. The carbs, huh? I guess the info would be on some RV chat listing?
My hangarmate's C-140 had his fuel line swell nearly closed running on partial (~E5) ethanol laced fuel. Turns out the airport had been getting "certified E0 loads" that were actually E10. He thought he was going to have to put it into Lake Superior.
From my limited knowledge of chemistry, the mixture of a hydrocarbon and alcohol makes a powerful solvent that can do all sorts of mischief to a fuel system elastomers as well as metal components. Supposedly a teflon lined hose would be immune to ethanol laced fuels. In reality there are very few dynamic elastomers in an aircraft carburetor. The only ones I can think of are the primer piston, the quick drains, the gascolator, and the needle & seat valve. The others are all static seals which only turn to mush when things are disassembled.
But that doesn't eliminate the problems of composite fuel tanks and internal piece-part metal corrosion due to frequent water separation of ethanol laced fuels. The marine people found that out.
Last edited by nrpetersen; 12-22-2014 at 07:19 PM.
I read it on the Vans Air Force forums a while back. You can probably search on ethanol there...
I must have missed that discussion even though I've been on VAF since it went live. The few instances I recall where RVers have admitted using E-10 have described how the engines seem to be running fine on the contaminated gas when proper storage is observed. The biggest concern with E-10 is the fuel pump diaphragm and tank sump o-rings. Ancedotal info sez the diaphragm in the Tempest pump is the same as the one in automotive pumps, but no manufacturer has stuck out their neck and officially made that statement. The o-rings are easily replaced with seals that are E-10 tolerant.
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