The blue color in the gas is actually from a dye, not a property of the fuel
itself; so if the blue color you see is not quite what you're used to, it
does not necessarially mean that there is a problem with the fuel. It could
just be a different or more dispersed dye.

With that having been said, Sporty's sells a fuel tester that has a float to
determine the fuel type regardless of color. It works just like any other
tester, except for the ball float; if the ball sinks to the bottom, it's
avgas or auto gas, if it's in suspension, its contaminated or mixed fuel,
and if it floats, its jet fuel or water.

http://www.sportys.com/acb/showdetl....roduct_id=1276



"Ben Jackson" wrote in message
news:%91jc.37417$_L6.2182786@attbi_s53...
I usually pump my own, but today I called ahead and had the FBO fill it
for me (only 53 cents more/gal!). I wasn't even present for the fueling
so I was extra paranoid during preflight, and I swear the 100LL was not
as "blue" as it usually is. It smelled like gas, and when I finally got
a big enough sample you could see a slight blue tint, but on a dip tube
I would have sworn it was clear.

So how blue is it supposed to be? Is there another simple test I could
have done to reassure myself (besides burning 30gal of it and having it
work fine)?

--
Ben Jackson

http://www.ben.com/