All I've seen around here is 91. That's what I'm gonna use. However if you're gonna use that it is recommended that you have a recirculation (insulated) love installed if you're using a throttle body system.
Ken Hurley On Sat, Aug 11, 2018, 5:40 PM Ppaulvsk via KRnet <krnet@list.krnet.org> wrote: > The private airport I fly out of (1IL4) just put in a fuel tank for > ethanol-free gas. But the problem is it's only 91 octane. I've noticed > most gas stations have 93 octane.Question, Is 91 octane normal for ethanol > free or is 93 octane available ethanol free. > > > Paul ViskBelleville Il.618-406-4705 > -------- Original message --------From: Mike T via KRnet < > krnet@list.krnet.org> Date: 8/11/18 3:24 PM (GMT-06:00) To: KRnet < > krnet@list.krnet.org> Cc: Mike T <mctagli...@gmail.com> Subject: Re: KR> > Mogas Blues. > I wish FBOs at airports would just sell ethanol-free auto gas. Then people > could use it with confidence or blend it with 100 LL to get whatever lead > level they wanted. > > Mike Taglieri > > On Sat, Aug 11, 2018, 12:07 PM Jeff Scott via KRnet <krnet@list.krnet.org> > wrote: > > > A few months would be about the right timing. I started using this > > particular station/blend (Murphy Oil, Ash Flat, AR) in March or April. > In > > July, I suddenly had failures in my fueling rig and multiple leaks in the > > fuel tanks and fuel system in one plane. The other plane only shows > > etching of the (hirshman) slosh compound in the tanks. > > > > The fueling rig and my planes have been running on Mogas from a single > > source in NM for many years. Never saw any sign of degradation to the > > fueling rig or the fuel systems on the planes. The problem is that all > we > > can test for is presence of Alcohol. I tested each 100 gallon load of > fuel > > purchased, and tested the fuel after draining it back out of the planes. > > No alcohol was present. I don't know what was blended with this fuel to > > cause the damage, so don't know how to test or ask other vendors about > > their fuels. Testing by putting the integrity of my fuel systems at risk > > is folly. That effectively renders Mogas unsafe for me to use in the > > future. > > > > Thanks for the research and discussion. > > > > -Jeff Scott > > > > > > > > Sent: Friday, August 10, 2018 at 10:49 PM > > From: "Jeff York via KRnet" <krnet@list.krnet.org> > > To: KRnet <krnet@list.krnet.org> > > Cc: "Jeff York" <jeffyor...@gmail.com> > > Subject: Re: KR> Mogas Blues. > > Jeff Scott, > > As promised I was finally able to run down my next door neighbor from > > Valvoline. > > > > Im going to try and glean this down as,we talked about your situation for > > over an hour. He said that the mogas you started using just since April > > could not by itself have compromised your fuel system. He said that they > > sold to Marathon a few years back but that only a few refineries exsist > in > > the USA. About 6 or so. That they, Marathon and most refiners refine just > > gas and that the additives are put in at the blending station at the time > > the tanker truck is filling. That blending stations contain the additives > > per the brands specifications. Now, not knowing the additives of the > > different mogas locations or brands you used or the state requirements > and > > differences between the two different states you bought your mogas, he is > > not sure of your mogas formula which even same brand in two different > > states could make for different additive blends of the same brand. All > this > > said, he thinks your fuel system when it was introduced to mogas from a > > different state had a different additive that reacted to the compromised > > fuel system resulting in you fuel system break downs. He said this takes > > considerable time but cautioned aircraft with fuel systems that are not > > using fuel components not capable of ethanol may be subject to fuel > > contamination or damage when flown on a cross country and the different > > blend bought at a different state or location may result in an issue. > But, > > he thinks the issue would not be immediate. Hense it took a few months > for > > your issues to arise. I hope I explained that correctly. > > > > Jeff York > > > > On Sat, Aug 4, 2018, 8:36 PM Jeff Scott via KRnet <krnet@list.krnet.org> > > wrote: > > > > > After years of running Mogas in both the O-200 in my KR, and the O-320 > in > > > my SuperCub, I have run into a particularly nasty bunch of Mogas after > > > moving to Arkansas. In NM, I had a good source for alcohol free premium > > > Mogas and burned it for years with no issues at all. But after moving > to > > a > > > new area, other than testing for alcohol, how does one verify that the > > > mogas being sold is free of any detrimental chemicals? > > > > > > In April I started running a new brand of premium Mogas (everything > where > > > I moved is new to me). Testing for Alcohol showed it to be alcohol > free. > > > This summer I was away from the planes for a few weeks. When I got back > > to > > > them, the flow meter on my fueling rig had failed (plastic gear that > runs > > > submerged in fuel failed), there were several leaks in my fueling rig, > > > including the fuel nozzle and the hoses. At the same time, both tanks > in > > > my supercub developed leaks and the O-rings in my primer failed. I'm > not > > > sure what kind of additive is in this fuel, but whatever it is > dissolves > > > epoxy, pipe dopes, and damages neoprene rubber. Impressive. I was in a > > > real panic as I had been running this stuff in both planes. > > > > > > I have spent the last 2 weeks working on the fueling rig and the > planes, > > > and trying to assess the damage to the planes. What I found is, the > epoxy > > > tanks in the SuperCub are both compromised and leaking at points where > > > there were penetrations through the tanks for various plumbing parts > like > > > the fuel drains and fuel pickups. I will have to cut the tanks open and > > > repair from the inside, which will give me a chance to better assess > the > > > damage. Additionally, the O-rings in my 2 year old primer failed. New > > > O-rings and some fuel lube fixed the primer problem. > > > > > > The fueling rig in my truck (12V fuel pump, flow meter, filter assy, > and > > > fuel nozzle all mounted to a 110G steel tank) had to have new hoses, > the > > > 1-1/2 and 2 inch piping had to be dismantled and put back together with > > new > > > pipe dope. The fuel meter had to be replaced. And the fuel nozzle needs > > > new O-rings. > > > > > > I drained the tanks on the KR, which are also epoxy, but were sloshed > > with > > > an alcohol resistant slosh compound 22 years ago. Upon inspection I can > > > see that the fuel etched the surface of the slosh compound, but I can't > > > find any peeling or flaking compound; and I have no leaks. So at least > > the > > > KR is OK for now. > > > > > > Not looking for advice, but am putting this out there for discussion. > I'd > > > love to hear ideas about how one verifies that the fuel is good other > > than > > > testing for alcohol. I don't need to hear about the wonders of > vinylester > > > as that was an unknown at the time my KR was built, and the tanks in > the > > > Cub were already built when I bought the project. > > > > > > For now, the KR is still flyable. But it is unlikely I'll complete the > > > fuel tank and wing repairs to the SuperCub before late fall. > > > > > > -Jeff Scott > > > Cherokee Village, AR > > > _______________________________________________ > > > Search the KRnet Archives at > > > https://www.mail-archive.com/krnet@list.krnet.org/. > > > Please see LIST RULES and KRnet info at > > http://www.krnet.org/info.html[http://www.krnet.org/info.html]. > > > see > > > http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org[http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org] > > to change > > > options. > > > To UNsubscribe from KRnet, send a message to > krnet-le...@list.krnet.org > > > > > _______________________________________________ > > Search the KRnet Archives at > > > https://www.mail-archive.com/krnet@list.krnet.org/[https://www.mail-archive.com/krnet@list.krnet.org/] > > . > > Please see LIST RULES and KRnet info at > > http://www.krnet.org/info.html[http://www.krnet.org/info.html]. > > see > > > http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org[http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org] > > to change options. > > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org > > > > _______________________________________________ > > Search the KRnet Archives at > > https://www.mail-archive.com/krnet@list.krnet.org/. > > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to > change > > options. > > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org > > > _______________________________________________ > Search the KRnet Archives at > https://www.mail-archive.com/krnet@list.krnet.org/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org > _______________________________________________ > Search the KRnet Archives at > https://www.mail-archive.com/krnet@list.krnet.org/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org > _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. 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