But
you bring up a good point. How does one tell just what you are getting
when you put in mogas or avgas?

If there are no visible contaminants, there is no water evident, and it
smells like gasoline, I run with it -- and unless you have some sort of
a chemical laboratory in your hangar, there's not much else you can do.

Like so many other things in this world, it's really not worth the
effort to worry about.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"