Look, it continously calculates the usage rate from the last reset.
You can reset it anytime you want, but if you want to be able to verify its results with your own calculation, then you need to reset at the fillup.

bill

 

Of course it can be a little after. It just won't be as accurate.

 

FWIT...

I average 20.5-21.5 combined city/highway driving.

On highway driving along I consistently get 23+ and on most trips I rarely see less than 80MPH and usually closer to 90; all to say I'm more than content with that MPG.

When I've checked the computer against calc by hand the computer seems to be very accurate (or at least accurate enough to give you a good idea of what mileage you are getting).

My Titan, on the other hand (which is my daily driver) doesn't do quite so well!

 

Lately I've been getting about 19.0, that's with the cold weather and using the cruise control CC really helps out if you're just going from point A to point B, I usually switch it on when I'm going about 50mph in 6th gear. I also try to watch the oil pressure to make sure it is below the half point line. Arghh..gas is killing me!

 

Just out of curiosity, how much is a gallon of premium running in the Los Angeles area these days? Looking at my last BPAmoco receipt (from 10/29), premium was $2.35/gal. (I'm in the Atlanta area.)

 

$2.35? Man, I believe I filled up for $2.17/gallon just last Friday. Weird how it can fluctuate as much as $.20-$.25 in the same general area, from the same gas supplier (I use Amoco also). I haven't noticed a rise in the past few days either.

 

i paid $1.93 this morning, of couse when you jujmp up to 93 oct the price jumps to $2.13. I live in upstate SC and we have the lowest avg price per gallon of the country.

 

So...am I to understand that you're putting regular in your Z? And it's supercharged?

 

scary

 

same thing it was in the last 200 threads about this subject

 

I average around 20-21

 

i've been averaging around 24mpg.... just bought my Z wednesday.. so far the calculator has been pretty accurate..

 

How do you know?

 

21,7 99% city, drive fast but accelerate carefuly

 

cause i've drove it from cincinnati (where i bought it) to evansville, IN (where i live) and i'm still on the same tank of gas... and have been keeping track of miles and such...

 

Then you can't possibly know how much gas you have actually used.

And so you cannot KNOW that the mileage computer is accurate. (although it almost certainly is)

To determine miles per gallon, you need 2 peices of info: 1) miles driven, and 2) gallons used.

bill

 

well, i'm guesstimating... based upon how many miles it says i have left before fill up and how far i've driven it so far and how many gallons i put into it when i filled up... i'm just saying it seems to be close thus far...

 

Oh come on. Play along. Write down a number. Any number will do.

 

mines usually around 14.