Zenith Aircraft Builders and Flyers
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100 LL replacement fuel
I have just learned of the effort to eliminate 100 LL fuel. I have an 0-235 engine with the Sparrow Hawk conversion and am required to burn 100 LL not MO gas like other 0-235 stock engines. The Sparrow Hawk has higher compression than the stock 0-235. Does anyone have any details if the replacement fuels will be compatible with the higher compression engines? I know when 80 octane leaded fuel was phased out I had all kinds of cylinder problems with my GO 300 engine and would hate to go through that again
Gil
Replies to This Discussion
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Permalink Reply by Joe Hopwood on
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Yes! That is why it is taking years to find that critter.
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Permalink Reply by Bill Alexander on
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Not sure if this fuel will fit the bill, but they had a display at the Light Sport Expo this week. They are up and running and trying to expand their distribution.
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Permalink Reply by Gil DeVault on
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I see they have 94 & 102 octane, but my FBO only has one tank and pump, 100 LL. Always something to worry about
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Swift will also install portable tanks and pumps.
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Permalink Reply by Carl Orton on
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Swift has been testing UL 94; don't know if that will meet your needs. Shell is also testing, but I'm unsure what octane rating they claim.
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Gil, It is my understanding that by definition, the approved replacement for 100LL will be acceptable for any engine that currently runs 100LL. Otherwise it would not be a true replacement. 100LL itself was a compromise as it replaced three grades I know of and there may have been more. Seems I remember 80, 100, 145 but I don't rely a whole lot on my memory. :-)
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I read from the Swift information page, but I didn't quite understand all of it. Like you, I would think a 100 LL replacement would cover all engines now using it, but then why have two different grades to replace 100 octane LL? I will call Swift and ask.
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I did not mean to imply that a single fuel must be used. But I don't really note exact spec they are working toward. I guess ideally there would be as many grades as there once was, as engines were designed and manufactured for a specific octane and lead contend. The 100LL was a compromise. Both octane and lead content above the old 80 grade and much less than the 145 grade.
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