there is some kind of additive to neutralize the effects of ethanol if i recall.
here's the $1.22 question-how do you know you are getting what you pay for?
i have a story.
as part of my job,i am a mixing technician for the helitorch backburn team.
prepping the burn mixture using gas and a gelling agent,regular pump gas
requires 5-10 % water in order to dilute the ethanol.
then fuel gels.
our fuel supplier provides us with premium(low or non ethanol)to fuel our small engines.
during training,we attempted to mix a barrel of gelled fuel for the helitorch.
it wouldnt gel til i added 2 gallons of water,telling me it wasnt premium.
the instructor confirmed this,only regular pump gas needs water added ,not premium.
now we need to have our fuel tested.