I was going to suggest the higher ethanol content, run low and fill up with an emergency 5 bottles of Recochem metho 95% ethanol. Do the test, pass with flying colours, quickly get to a servo and fill up with 10L of fuel, run it down to dilute the ethanol, then fill the tank up per norm.
I can't see it hurting if done over the course of a couple of hours, I've done this with a corolla with a 4AGE, I ran close to pure ethanol in an emergency and it actually ran beautifully.