Do your own experiment removing alcohol
It takes a substantial amount of alcohol to remove water from gasoline. Therefore it takes relatively little water to remove lots of ethanol. Water and gasoline do not mix. But if purified wa...
Forum Discussion
steveh27 wrote:
Ethanol will absorb some water, I think less than 1%, so it can remove some water from the tank vs regular gas. But, once it surpasses that small % it will then permanently phase separate. The alcohol will come out of the gas & merge with water as a separate layer on the bottom of the tank. It will never go away and must be drained. The top layer of remaining gas will lose around 3 octane, ie 87 octane will become 84 octane.
https://www.boatus.com/magazine/2011/december/ethanol.asp
I probably find it hard to believe that the motion at the rear of a motorhome or tow vehicle when going down the road won't prevent any layer on the bottom of the tank from staying unmixed in with the liquid above.
Hopefully, when underway the engine will be forced to somehow eventully have burned/boiled-away everything in the tank regardless of composition. But good luck with the gas mileage while doing this.
