3,400 Mile Calculation.

[erhayes]

Mileage calculation over 3,473 miles using 87 Octane top tier fuel. Average 28.3 MPH with one Standard Deviation of 0.63. This all local easy driving in an suburban setting with AC on ~ 50% of the time. Ed Hayes

 

[PhoenixINX]

Mileage calculation over 3,473 miles using 87 Octane top tier fuel. Average 28.3 MPH with one Standard Deviation of 0.63. This all local easy driving in an suburban setting with AC on ~ 50% of the time. Ed Hayes

Lots of calculating just to determine an average speed.

 

[CX-SV]

Guessing it sounds like typo originally, sb MPG...

 

[erhayes]

MPG is the correction. Sorry

 

[paris1]

Is that a dash readout or hand calculations? 2.5 ltr, right?

 

[erhayes]

Mostly calculated but, a few dash readout. I've found the dash readout correlated quite well with my hand calculations and typically very +/- 0.6 mpg.

 

[paris1]

Wow; I've found mine varied up and down as much as 5% either way. But I've kind of come to the conclusion that, over the long haul, it's probably fairly accurate. And 28.5 sounds to be pretty much dead on, maybe slightly better than average if it's the "big" motor.

 

[nXt]

Just sign up for Fuelly.com (check my signature), no need for manual calculations. Keeps a history, etc.

 

[paris1]

Just sign up for Fuelly.com (check my signature), no need for manual calculations. Keeps a history, etc.

Compared to my old Nissan Frontier p/u, this thing gets phenomenal gas mileage which makes itself apparent in any number of ways (like gassing up about half as often as I used to). I'm not that anal about whether it gets 28mpg this week or 29mpg last week, so it's not worth the effort to use Fuelly. I just spot check it from time to time to be sure it's still in "the zone".

 

[piotrek91]

Wow; I've found mine varied up and down as much as 5% either way. But I've kind of come to the conclusion that, over the long haul, it's probably fairly accurate. And 28.5 sounds to be pretty much dead on, maybe slightly better than average if it's the "big" motor.

Unless you are filling to the brim and see gas in the filler neck, I get the feeling that the dash readout is more accurate for a single tank than the fill up method.
The pump shut off can be inconsistent between fill-ups even if you use the same pump and if you use different pumps/stations it can vary by .5 a gallon or more. I find that when the car is facing downhill I can get more gas in than when it's facing uphill.

 

[dougal]

Unless you are filling to the brim and see gas in the filler neck, I get the feeling that the dash readout is more accurate for a single tank than the fill up method.
The pump shut off can be inconsistent between fill-ups even if you use the same pump and if you use different pumps/stations it can vary by .5 a gallon or more. I find that when the car is facing downhill I can get more gas in than when it's facing uphill.

Yup, I can't believe how many people wonder what is more accurate, the gauge or the pump method. Every time you pump gas, the amount you actually pump can be different and it may have nothing to do with how much gas you used or how much gas is left in the tank.