gliderguynj wrote:

This raised a few questions for me....Are there any extra safeguards
regarding the delivery and or testing of 100LL before you put the
nozzled in your tank? By draining the gas and looking in the GAT jar
assuming it looks correct, could you still be in risk of having bad
gas? How long would it take for that bad gas to reach the engine?


Define "bad gas".

I would imagine that the "bad gas" from the auto service station, that
actually caused cars to stop running, was contaminated with water,
diesel fuel, or crap (rust, dirt, or other debris). All should be
apparent in a GATTS jar if viewed, sniffed, and touched.

If gasoline were mixed with with large amounts of some sort of bad
additive or if a low octane fuel were accidentally dyed as 100LL, I
think we'd have a problem that we wouldn't know about before startup.

On a typical piston aircraft, I'd think the problem should make itself
evident during a proper runup, unless there is a very short taxi. I
drain my gascolator for two full jars, which should clear the entire
line to the selected tank.