George Patterson wrote:
Mike Spera wrote:

One well known aviation university teaches you to "fly out on the tank
you flew in on".


I take off on "both." If either one works, I have gas.

Doesn't that also mean that if one of the tanks is contaminated, you're going to
draw the contamination into the engine, with no option of switching to a good
tank (or, at least, you don't know which tank to switch to).