The ethanol in 87 or any grade for that matter carries some energy producing equivalent- possibly octane, if separated from 87, I️t will definitely no longer meet spec for 87 octane. At least that is how I️t has been explained to me.
Sent from my iPhone using Tapatalk
Try this site https://www.pure-gas.org/
Don't know how accurate and up to date it is. We have lots of non-ethanol gas outlets in south Louisiana due to all of the outboard motor boats.