Typical "tank" averages and lifetime Computer readings

wvgasguy · 10-06-2009, 07:03 PM

OK, I babied it when I first got it and then it became the daily driver. Someone asked about "tank" averages, this is what I get on a V, driving mostly interstate (low traffic) at or above the speed limit. Since I can't keep lifetime computer averages, I record the reading and then calculate the theoritical gallons it would have taken to give me that FE reading. Now I can compare long term manual calculation to the computer over a long term.

The computer is averaging almost 2 mpg too high. I'm not disappointed though. I do know on rural 2 lane roads I can get 56 mpg consistantly. I can get 60 driving into town and back. Unfortunately that is not what makes up my normal route. In the HH we average 23.5 and the Expedition 14.5 over the same routeins.

(Sorry, the chart I posted looked good until I posted it but then it got screwy. 45.35 vrs lifetime computer reading of 47.26 over 5939 miles is what it would have shown)

DaveinOlyWA · 10-14-2009, 10:23 AM

my tanks averaging just over 600 miles. that will probably drop as last tank posted yesterday is last "summer" gas. winter gas performance will be less. probably into the mid 500's

10-06-2009, 07:03 PM	#1
wvgasguy Senior Member Join Date: May 2009 Location: North Central WV Posts: 1,129 My Car: 2010 Prius Model: V Package: Navigation Thanks: 5 Thanked 150 Times in 94 Posts Friends: 2	Typical "tank" averages and lifetime Computer readings OK, I babied it when I first got it and then it became the daily driver. Someone asked about "tank" averages, this is what I get on a V, driving mostly interstate (low traffic) at or above the speed limit. Since I can't keep lifetime computer averages, I record the reading and then calculate the theoritical gallons it would have taken to give me that FE reading. Now I can compare long term manual calculation to the computer over a long term. The computer is averaging almost 2 mpg too high. I'm not disappointed though. I do know on rural 2 lane roads I can get 56 mpg consistantly. I can get 60 driving into town and back. Unfortunately that is not what makes up my normal route. In the HH we average 23.5 and the Expedition 14.5 over the same routeins. (Sorry, the chart I posted looked good until I posted it but then it got screwy. 45.35 vrs lifetime computer reading of 47.26 over 5939 miles is what it would have shown) Last edited by wvgasguy; 10-06-2009 at 07:06 PM.

10-14-2009, 10:23 AM	#2
DaveinOlyWA 3rd Time was Solariffic!! Join Date: Apr 2004 Location: South Puget Sound, WA Posts: 12,378 My Car: 2010 Prius Model: IV Package: Solar Roof Thanks: 24 Thanked 121 Times in 103 Posts Friends: 10	Re: Typical "tank" averages and lifetime Computer readings my tanks averaging just over 600 miles. that will probably drop as last tank posted yesterday is last "summer" gas. winter gas performance will be less. probably into the mid 500's

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