Anyone run E15 or 88 in their 7.3?

[PapaRaptor]

Our local gas station offers E-15 88 octane for about 10 cents per gallon less than 87 ( 10 % ethanol )

The 88 is up to 15% ethanol. I run it here and there in my Jeep Wrangler with no troubles. But the tank is small and I can go thru it fast.

My 7.3 has a much larger tank and I don't drive it all the time so I am concerned about the higher amount of ethanol sitting in my tank.

 

[75FordMan]

I’ve run the e15 a few tanks. Very minimal difference in fuel mileage but keep in mind it’s up to 15% so it can vary tank to tank. You mention you don’t drive the 7.3 much if that’s the case I’d recommend E0. Ethanol does not like to sit and draws in moisture.