XJB, I think out "bad" tank was actually caused by the pump shutting off to early and giving us a low fill on the previous tank.

Topped off last week and then topped off again today at the same pump - about 300 miles in mixed driving. Doing the math I got 38.2 - the NAH's computer read 38.1 so I feel confident that whatever the car's computer calculates is fairly acurate.

I would have to agree with you on that 300 mile, same pump etc. practice.

Besides, I haven't been to the gas station in a week, I think they might be wondering if I'm OK? ........

My wife developed the habit of not going far past the last quarter mark before refilling in our last car. She has carried this over to the Altima. I have convinced her that we have well over 100 miles to go so we have compromised on 500 miles, a little past the mark. for the last 4 fill ups, we have looked for gas at 500 miles and have averaged 35.4 to 35.9 on each fill.

I noticed that there are two entries in for the Altima Hybrid now in the database, but did someone enter the wrong figures? It shows an MPG of 333. Come on! That is some Hypermiling if it were true.

I consistently get >35 mpg on my daily commute. I generally fill up at about 720 miles per tank. I know I still have gas in the tank, but don't know how much. I also know that I go farther than the calculated mileage says that I am supposed to be able to go...

My commute is 25.3 miles each way, generally with 3 slowdowns going to work where miles per hour is <40. I generally do about 63 miles per hour when doing rest of my commute from San Jose to Palo Alto, via 85 and 280. Then my return is really variable because I don't necessarily go same path home.

Right now 648 miles, 37.1 mpg and 3/8ths of a tank left. Says I can go 58 more miles, but that can still vary.

I love the 20 gallon fuel tank.

I haven't tried to go for hypermileage yet, but I do know that I have changed my driving habits some and there are some parts of my driving where I do try to go 38 mph because that is very consistent where I can get the car to go in electric for a couple of miles.