That app is great for finding it but the prices vary tremendously.

There is a gas station/travel shopping center chain called Buckee's in Texas and now other points east. The one in my town is a little baby Buckee's with only 28 pumps and normal fuel. They have a mega store 26 miles away in Bastrop that sells ethanol free 90 octane for about $.20 more per gallon than ethanol mix 87 octane. That is a great deal since it is cheaper than the ethanol mix premium by a good bit even.

Colton was outside of Dallas a few weeks ago and stopped at a Buckee's to get ethanol free and it was $1.00 per gallon more than ethanol mix premium. Same company crazy price difference. Another store 35 miles in the other direction claims on the Puregas app to have ethanol free but it is 87 octane and $.50 more per gallon than premium mix.

Basically, don't rely on that app if you have to put ethanol free in to continue your journey. Unless you can call or some other way verify what octane it is and what price it is. Plus, if they actually have any that day.