Forg;106337 wroteYeah our Redline is flex, but I've never actually pulled into a servo with E85 (and you need a few fills to clear out the tank anyway) so my curiosity has never been sated.
There is a YouTube channel performance engine builders, that show, how the moisture and e85 can remain in the tank and lines for ages. After multiple tanks of petrol.
Though flex sensor cars will read what % ethanol the fuel delivery is. And adjust accordingly.
So stressing about giving a tank or 3 ago isn't an issue