25.3 MPG with Auto
I just filled up my Mazda5, auto trans, for the first time. 338 miles driven since the dealer filled it up, and I just put 13.35 gallons in to fill it up again: 25.3 MPG!
About 80% of the miles were highway. Most of the miles were with only 2 people in the car (driver + passenger) but some of the miles were with 4 people. We actually drove it up a small mountain when we had 4 people in it, so I thought that our MPG would suffer...it doesn't seem like it did.
Considering that we had the AC on 100% of the time during these 338 miles, I'm very satisfied with the MPG that I got!
By the way, my gas light went on 18 miles before I filled up my tank, and when I filled it up I only put 13.35 gallons into the 15.9-gallon tank. Based on these numbers, I think that I had a little more than 3 gallons left in the tank when the gas light went on...that's kinda early for it to come on, but better early than too late! My Civic is the same way: it has a 13-gallon tank, but I've never put more than 11 gallons into it because the gas light goes on when there are about 3-4 gallons left in the tank.