[quote=“MikeFive, post:26, topic:22949, full:true”]
George: You could either show existing data that proves that G100UL is safe for use in aircraft, storage tanks, fuel trucks, barges, pipelines, railroad cars, etc., or you could submit G100UL for extensive testing in this regard (something akin to what EAGLE is requiring). You really have no other options. I am afraid that anecdotal information about one plane or the other being okay with G100UL is not particularly convincing. That is not my opinion, but appears to be the opinion of the shippers who will not touch the fuel, as well as Cirrus and Lycoming.
You apparently chose a very reactive octane booster for G100UL, maybe one that others have considered but have avoided. To compound this, you chose the STC/no-ASTM route, which, with little doubt, has less rigorous requirements for proving materials compatibility than the other routes. Again, I emphasize that EAGLE is requiring materials testing on some 160 different materials. Why are you surprised by some skepticism in regard to the materials compatibility of G100UL?
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Mike,
I am not surprised by any skepticism by almost anyone about a fuel issue.
You may be unaware, but GAMI collaborated with a major 100LL distributor and installed an entire airport 10,000 gallon storage tank with airport / industry standard plumbing, filters, seals, gaskets, etc… etc… etc… Then used that to produce an 8,000 gallon conforming batch of G100UL Avgas on the ramp at Ada. There are pictures of that facility in various places and presentations about G100UL Avgas. Maybe you missed those.
We did that three years ago .
That airport fuel delivery system has had G100UL Avgas in that system continuously with hundred thousands+ gallons of fuel circulated through that system. All of the components in the standard airport fuel delivery system are included. All have been continuously exposed to G100UL avgas through multiple winters and summers.
The worlds largest producer of airport fuel system filters (FACET) has had their laboratory evaluate the filters after two years of fuel exposure and they wrote a report finding the standard airport fuel system filters to be completely compatible with the use of G100UL Avgas.
ASTM does not do testing. Period.
I am not sure why you keep suggesting they do. An ASTM fuel specification is EXPLICITLY STATED to have one purpose and one purpose only: To be used by “Purchasing Agents”. It is a document whose primary purpose is to facilitate commercial transactions between a buyer and a seller.
Comment: ASTM does an enormous amount of extremely valuable work when they are creating test specifications. For such things as D2700 Motor Octane Number; D86 Distillation tests, etc etc.
When they involve themselves into the arena of “products” then there is an enormous and inherent conflict of interest between the major participants that control the “levers of power” within ASTM. We have already been the victim of that inherent set of conflicting financial interests - - once. Which, after consulting with FAA General Counsel, is why we decided to proceed with the FAA specification.