Saw this on a YouTube channel I stumble over from time to time.
https://youtu.be/TQZK-hcl5M4?si=rRRTCBDTzg6BqLyW
Spoiler Alert!
If you are use a fuel station that has a shared hose for dispensing, you'll take in at least a third of a gallon of whatever the last customer bought. Selecting Non-Ethanol at the pump doesn't mean you'll get ethanol free in the tank.
Of special interest is the top comment from someone indicating experience in the field.
Discuss.