In article ,
"Roger Long" wrote:

No, I was talking about my own plane. I used to do a lot of flying and fuel
sampling.

It only takes a little bit of crud to lodge in the valve and it drips,
usually slow enough that it evaporates before building up again. Resampling
usually fixes it. Not something you would want happening on a boat where
there is no place for it to go though.

That's why Aircraft Fuel costs more than Regular Fuel. It is the price
of Filtering and Documentation of that Filtering to meet FAA Fuel
Specs...