What car are you running it in?
If your gas tank is crudded up extra ethanol will suck the crud and water out of your tank.
I’ve run e15 on and off since 2001 when it first came out. Lately it’s around $2.30 a gallon as compared to e10 at $2.50+
My cars all love octane and I seem to get smoother running but otherwise no difference in economy.
I will agree it works best in warm to hot weather though.
Wow. Not only can you not read the OP's post (What car are you running it in? Something 1960’s?), you've also been running E15 for a full decade before it even was approved by the EPA to be sold! You'll always be my first source of information from never on. It's amazing that your cars all love octane and they run smoother, even though the pump octane is identical.
Lol, I see your point but with the right hat you could cover it.
I only have to guess you have never seen an ethanol blender pump or e85 is not sold in your area so you figure it didn’t exist?
Anyway I live in Wisconsin, I have been able to get higher gasohol blends since 2001, (like e20 & e30)
e85 blender stations in 2004. I am told the first e85 station opened in 1996 but not near me.
Believe it or not there are fewer ethanol options today than there were up through 2009, when blender pumps were common out in the country.
If it “wasn’t approved “ it certainly didn’t stop Utica fuels and others from selling it as an option.
E15 has always been 88 or 90 octane
e20 89 or 91 octane,
E30 90 or 93 octane
RUG around here is always 87 octane, go west further and it’s 86 octane, 88 is higher than 87. Vapor point and cooling is much higher on e15 than RUG as well.
Next, The ops car could be one of over 60 different models, my “hybrid” was made in 1999, maybe his is too?
might as well say it’s a diesel that narrows it down.