Why I never use E-85 without testing

[BurnTire]

Yea thats right 93% Ethanol. This would create a dangerously lean condition with a tune for 85%.
This is the second time I have had over 85% straight from the pump. I cut it down to 85% by adding some 91 octane to the mix.
I never ever pump it straight into the car. It always goes into jugs first.