I'll get my research assistant on it in short order. But for comparison, it was fuel pulled from a standard pump labeled as 10% ethanol. I know that it varies, and I'd love to buy stuff without ethanol at all, but no such pump exists within an area that I'm willing to readily get fuel from. The reason for the test was that I read somewhere that water could separate and while you may use the quick drain and not get any, it could be suspended in the fuel. I couldn't get good separation until the fuel turned to a runny jello like consistency. Flying with that would have other major implications.
I want to be clear that I'm not advocating what anyone else should do, I just figured I had the resources to run a simple little test and see what happened. I don't think a modern boost pump will be the problem, it's probably if you want to run a legacy mechanical pump that the "rubber" membranes and o-rings could be a problem (and the "rubber" fuel hose).
I've not rebuilt my fuel pump, but was planning on it just because. I'd expect any automotive rebuild kit will have newer material and just looking at the thing I'd bet it takes all the same parts inside as any early model car fuel pump.
To me this is experimental, and what it's all about. That being said, I shall be well practiced on my engine out procedures!