E85 from murphys makes E30 at 2:1 gas to eth every time, so I don't really see how E48 will need any more than the 1:1 any online calculator predicts
I guess we will see what we will see.
Are you leaving your gauge plugged in or just when you test fuel when you fill it?
We are using the same stations and I fill up once a week at min, and even when I was on the jr e30 mix and using “online calculators” was never accurate unless I input the e85 more at e65-70. So someone’s sensor is reading wrong lol.
If your 91 is 10% and your ethanol is at the pump is 70% 1.1 is not achievable, you need pure 85% for that mix.
Murphy’s is NEVER 85%... on super good batch’s it’s only over 60% . even the best station in town that has a good min rating guarantee of %75 is always below 80.
I’ve had a case where the tank was at E61 and i was at 1/2 tank and was near the Murphy’s station so I decided to add 3-4 gallons of e85 and see where the gauge landed before I well and got shell it is dropped my content down to e57...
That’s why when you read the Murphy pump they only guarantee to not be below E50.
Have you tested any of the stick you store in the garage with one of the glass bottle testing kits? I never tried one at the pump cause I didn’t want to be that bill Nye looking person at the pump, lol. Maybe I will have to to make sure my sensor is right.