Partial Fill Ups

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The data entry area on the Fuel Log tab includes a checkbox for "Complete Fill Up". This checkbox is used to indicate whether the fill up is Complete or Partial. The fuel efficiency will not be calculated for a partial fill up, since it is unknown how much fuel was used for the distance driven; however, the fuel volume and the odometer change values will be included in the Fuel Efficiency calculation for the next fill up and for the overall fuel efficiency.

 

Example "miles per gallon" fuel efficiency calculations with partial fill ups:

 

 

Date:

Begin

Odometer

End

Odometer

Odometer

Change

Volume

Complete

Fuel Efficiency (MPG)

Notes

10/15/2012

0

100

100 Miles

10 Gallons

Yes

10 MPG

MPG = 100 / 10

MPG = 10

10/31/2012

100

200

100 Miles

5 Gallons

*No*

N/A

The fuel efficiency is not calculated for this Partial Fill Up.

11/15/2012

200

300

100 Miles

15 Gallons

Yes

10 MPG

The fuel efficiency for this entry includes the volume and odometer change from the previous partial fill.

 

MPG = (100 + 100) / (15 + 5)

 

MPG = 200 / 20

 

MPG = 10

 

 

Overall Fuel Efficiency = Total Odometer Change / Total Volume of fuel used

Overall Fuel Efficiency = 300 / 30

Overall Fuel Efficiency  = 10