I use GasCubby on the iPhone to keep track of my mileage, spending, and maintenance on my Z.

Average Gallons per Fill Up : 16.98
Average Miles per Fill Up : 324.06

Most Gallons per Fill Up : 18.88

I have also gotten the following amounts : 18.00, 18.20, 17.72, 18.40, 17.95, 18.06, 17.54, 18.02, 18.80, 17.90, 19.82, 17.87, 17.70, 18.38, 17.71, 17.64, 17.59, 18.48, 18.18, 17.84, 17.92

Keep in mind I have a tendency to push it too far.. obviously.

I use gas cubby as well. Great app!! Just filled up with Shell premium and filled up 17.5 gallons. Cost me $56.xx.

Does anyone know why we have to use premium, while the mustang can use either 87 or 91?

Why?

I've driven 20-30 minutes after the car says I have --- miles left in the tank. Where I was, I had to. When I filled up, I still had 1.5 gal. in the tank :icon14:

Some people argue that the bottom of the tank has contaminents floating around. Others say that is not true. No objective info out there that I have seen either way.

I always fill up when my light comes on telling me to fill up.