plastic
Champion Author
Virginia
Posts:46,787
Points:2,837,170
Joined:May 2004
|
Message Posted: Apr 10, 2012 1:06:42 PM
>"So stupid and worthless."
I'd be inclined to agree with you but I've never even clicked on the Fuel Logbook link in my life and therefore cannot comment.
|
cheapmonkee
Champion Author
Portland
Posts:30,306
Points:3,170,435
Joined:Jun 2004
|
Message Posted: Apr 10, 2012 1:00:02 PM
OK, I just verified what was stated below by adding all the mpg averages for my car and came up with the bogus 2012 average for the year. So stupid and worthless.
|
kwzh
Champion Author
San Jose
Posts:20,643
Points:3,681,490
Joined:Jul 2001
|
Message Posted: Apr 9, 2012 9:41:33 PM
I believe the "known bug" is that the fuel logbook computes an unweighted average of the mpg figures for each interval; e.g., if the first interval is 5 miles, 1 gallon, for 5 mpg, and the second 60 miles, 4 gallons, for 15 mpg, then the average is computed as (5+15)/2 = 10 mpg instead of (5+60)/(1+4) = 13 mpg. Is this what we're all talking about?
|
plastic
Champion Author
Virginia
Posts:46,787
Points:2,837,170
Joined:May 2004
|
Message Posted: Apr 9, 2012 6:10:07 AM
>"This has been discussed in the past, and the explanation of how the calculations are performed made sense at the time."
So how does that apply to the current problem that cheapmonkee is having?
|
cheapmonkee
Champion Author
Portland
Posts:30,306
Points:3,170,435
Joined:Jun 2004
|
Message Posted: Apr 9, 2012 12:02:32 AM
Miles driven/gallons purchased=mpg. If the GasBuddy running mpg average differs from that figure then it makes NO SENSE. Fuelly.com is accurate. If this was my site I would fix it ASAP, (it would be a major embarrassment to me) this is not rocket science.
|
bytebug
Champion Author
Orange County
Posts:26,379
Points:4,122,655
Joined:Oct 2001
|
Message Posted: Apr 8, 2012 8:31:57 PM
This has been discussed in the past, and the explanation of how the calculations are performed made sense at the time.
|