Bummer on running out of gas, it is also one of my big fears when going for record distance on the NAH or any car. On your comment of never going above 45mph, I would have to disagree with you. The charging of the HV battery would kill your FE. I feel a combination of the right commute and using the ICE and EV mode at the right time is key. I am also curious, IAN33 I have read in some of your posts that your display reads around 38 MPG, have you calculated by hand, and is the hand calcs and display closer than many of us are getting. Eg I can get a tank which the display shows 46 mpg but the hand calcs are around 43. Incidentally, my recent commute to North Pole NY 650+ miles, the display showed 39.5 and my hand calcs were dead on 39.51002. It may be that the EV mode results in some error.

 

I believe the computer, on average, is going to be more accurate then hand calculations.

All cars have gas in the line and odometer error and all gas pump displays have gas in the line and display error. Between the two it would be a miracle if the margin of error wasn't at least + or - 3%. The computer uses an algorithm to determine MPG and would always be the same amount off if the other two were consistent, but none of them are.

You could use an advanced GPS to check on your milage error, but you would need to use the same pump every time to figure out the pump error. These are some of the reasons why Consumer Reports always attaches their own back wheel odometer when they test cars and why the government constantly monitors pumps.

 

My mpgs are hand calc based on gallons and miles. By the way, if I went by the Nissan tank size, my mpg would be higher, but I have regularly have put 22.5 gallons into my NAH. Don't know why the differences, but this isn't from the same gas station, but multiple ones (including different brands). Have come to the conclusion that my display is 1.7 mpg off also.
860 miles @ 39.0 mpg - 22 gallons
861 miles @ 37.97 mpg - 22.685 gallons
821 miles @ 36.6 mpg - 22.4 gallons
827 miles @ 37.0 mpg - 22.3 gallons
880 miles @ 39.0 mpg - 22.5 gallons (changed my driving technique and think I know how to get this mileage consistently).
All of this was fillup to fillup.
Not sure if I can get 900 miles out of a tank, but it might be possible... I have seen individual days much higher than the average.

 

You either have a non-standard tank or are getting royally ripped off at the gas station (are all of hour fill-ups at the same station?). I have run out of gas twice in my 2007 NAH pushing the limit. The first time it took 20.0 gallons (It died driving uphill). The second time it took 19.5 (it died on the freeway and I drove it on EV mode for about a mile.)

If all of your fill-ups are at the same station, I would report the dealer to your local weights and measures regulators, providing them with the data above AND get an attorney to sue the gas station on behalf of you and every other customer.

 

I have had this discussion before.
https://www.greenhybrid.com/discuss/...tml#post187687
Do you top of you NAH, I don't just stop when the pump clicks off.

 

lol, that was me who was asking about that. you just have many crooked gas stations, lol. I think you probably have a non standard tank. maybe they accidentally put in a murano tank in your altima? I def wouldn't mind getting 800 mile range