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Rotax Engines-List: 91 octane and time to be heard

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daberti(at)sbcglobal.net
Guest

Posted: Wed Aug 06, 2008 6:04 pm Post subject: Rotax Engines-List: 91 octane and time to be heard

I'm confused, are you agreeing with Chevron or want Auto fuel made available

to all of the aviation community?  Do you agree with the implication that

any 91 octane unleaded fuel (automotive based) Chevron supplies to an

airfield is contaminated, cross blended, or have an ethanol content and

octane rating that they cannot document?  Are you against refueling an

aircraft with gas purchased at the corner station for the reasons stated by

Chevron, or believe it would be different in the tank at the airport?

Myself, I always try to run 91 unleaded auto gas in my Rotax 912 ULS because

it's better for the engine.  I wish EVERY airport carried 91 auto fuel.  I

have personally seen the amount of lead sludge that accumulates in both

Lycoming and Rotax engines running 100LL.  I change oil at 20 hrs and

replace plugs after extended periods of using the 100LL.  On my trip through

the Dakotas, Montana and Wyoming all I could get at an airport was 100LL.  I

currently use stated 10% ethanol blended fuel because that's what is

available and it runs just fine.  I'd like it better without the ethanol,

but only because I think the ethanol blending is a bunch of baloney!  Roger,

I'll be headed your way this fall.  Is the Auto fuel available in Arizona?



Dave



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Roger Lee

Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

Posted: Wed Aug 06, 2008 8:56 pm Post subject: Re: Rotax Engines-List: 91 octane and time to be heard

Hi Dave,



I absolutely want 91 Octane available. Chevron's stance is they refuse to entertain the idea of aircraft using any of their ground based fuel. They are so foolish as to think people don't buy their fuel and use it form a gas station. Some airports in the country actually carry Chevron mogas, but it is usually 87 octane. A few FBO's are just starting to carry the 91 octane. I guess they think if it's not at the airport no one uses their fuel? I have been using 91 octane in three Rotax engines over the years. Yes I have and do at times use 10% ethanol 91 octane. I would like to see 91 octane offered at airports and or some gas stations. 

In some of my flying in hotter weather and 3 other people I know, we are having fuel pressure problems that may be related to the different vapor pressures in the ethanol fuel, due to high under the cowl temps. I am in the process of testing as we speak. We had ethanol free fuel here, but it is getting harder to find.



This is a nation wide issue and I would hope that pilots just don't sit and hope the situation will change without their voice. It is getting worse, not better at this point in time. That's why I am hoping that aviators around the country will take just 5 minutes and email some of these people.



Dave,

 The ethanol is not put into the fuel until it is time for transport. You may be able to get ethanol free fuel at a fuel supplier and set up an account.

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_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Sat Aug 09, 2008 5:54 am Post subject: Rotax Engines-List: 91 octane and time to be heard

I take it the best thing to do is to pressure oil companies to produce and

deliver to FBOs a 91 octane unleaded standardized non booze fuel.  



I'm in, for all the reasons Chevron stated and a few more as well.  



Just send me an E-mail address or even an online petition to both our

governments to have such a fuel available.



Noel



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