Fuel-up Edit/Save Inaccuracy - Fuelly Forums

Click here to see important news regarding the aCar App

Go Back   Fuelly Forums > Fuelly Community Support > Fuelly Web Support and Community News
Today's Posts Search Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 08-10-2009, 11:36 PM   #1
Junior Member
 
Join Date: May 2009
Posts: 3
Country: South Africa
Fuel-up Edit/Save Inaccuracy

When editing a fuel-up, the values I originally entered differ from what is shown on the edit screen.

Hi

A recent long-distance trip gave me the following (Metric):
KM: 542.0
Litres: 35.925
Price/litre: 7.5490

I entered the fuel-up, but wanted to edit it afterwards. However, the edit screen gives slightly different values:
KM: 542.027 (Off by 0.027)
Litres: 35.924 (Off by 0.001)
Price/litres: 7.549 (Fine)

Even after correcting the values and saving, the dashboard shows Litres as being 35.924 instead of the 35.925 I entered (KM is correctly shown as 542.0).

I realize that Fuelly isn't supposed to be a super-accurate accounting tool, but it'd be nice if it kept the values I enter.

Thanks
__________________

Zelphar is offline   Reply With Quote
Old 08-10-2009, 11:54 PM   #2
pb
Senior Member
 
Join Date: Jul 2008
Posts: 1,588
Country: United States
Location: Corvallis, OR
Behind the scenes we convert all data to US English units for storage, so we never have the exact data you entered into the system. We do this so we can show all fuel-ups in whichever units a user wants: US units, UK units, or metric.

And we store all data to a precision of three decimal places. So in the process of converting from the metric units you entered to the US units, we lose some precision. Short of rebuilding Fuelly from the ground up to store data in a different way, this level of precision is something we're going to have to live with. It's not precise enough for exact numbers, but the whole process of measuring fuel economy based on a full tank is more of an art than a science. I think this level of accuracy is acceptable for finding realistic averages.
pb is offline   Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Fuelly Android Apps
Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 05:15 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.