ZFuel provides access to data and calculations that you can use to improve fuel efficiency as well as driver behavior. Use this information to guide drivers to save fuel and reduce costs by showing potential savings based on MPG, Fuel, Speed, Cruise, RPM, Gears, and Idle.
This report is not used for electric vehicles.
While ZFuel provides a comprehensive look into an asset and operator’s efficiency in relation to fuel consumption, ensure that the information is properly analyzed and used only as guide in training for efficiency.
What can drivers do to improve their score?
- Do not travel at speeds above the OverSpeed Max established for the asset they are operating.
- Not applicable to road grades -1% or steeper.
- Do not idle longer than the maximum duration set in the Idle Max established for the asset they are operating.
- Applies to Driver Efficiency score, not Operator Efficiency score.
- While in motion, keep engine RPM within the Min/Max RPM range established for the asset they are operating.
- Not applicable to road grades -1% or steeper.
- Engage cruise control when exceeding the CruiseMin speed for extended durations.
Each of these settings is controlled on a per-asset basis with the ZFuel Admin section of Ground Traffic Control.
Generate ZFuel Reports
The ZFuel report provides links to many different charts, tables, and diagrams representing fuel efficiency, driver status, and other similar statistics. To navigate back from these various views to the original search results table, do NOT use the browser’s Back function. Instead, in the top-left corner, click the Breadcrumbs; for example, click All Assets, or click the Asset number.
- To access the ZFuel report, on the min menu click Reports, and then under Fuel, Diagnostics, and Usage, select ZFuel.
- Click Filters, define the following criteria to narrow your search results, and then click Apply.
| Asset No | Expand the drop-down menu and select the assigned asset ID for which you want to search or select all assets to return all applicable results. |
| Location Filter | Expand the drop-down menu and select a location where the assets are assigned. |
| Attribute Filters | Expand the drop-down menu and select a custom-defined attribute filter from the list. |
| Select Attributes | Expand the drop-down menu and select a custom-defined attribute characteristic from the list. |
| Fuel Price | Enter the threshold value used when calculating the fuel lost due to inefficient driving. |
| Idle Source | Select one of the following two options for calculating the source of Idle: Fuel Counter—Uses half (½) liter fuel increments during idle events to calculate idle fuel loss. Burn Rate—A specific gallon per hour burn rate is multiplied by the amount of time spent idling. The default burn rate is (.70) of a gallon per hour. |
| Date | Select either Today, Yesterday, or specify a date range. The maximum custom date range is three months. |
The search results table displays the following information matching your filter criteria:
| Show/Hide Columns | Click to select the columns you want displayed/clear columns you want to hide in the search results table, and then click Refresh. Available columns include: Distance (mi) – Based on the odometer readings of the asset, this column displays the total distance traveled during the specified date range. Fuel (g) – This is the total fuel used by the asset during the range of time specified. This is based on half (½) of a liter shot through the fuel injectors. MPG – This is the total distance divided by the total fuel. Moving MPG – The distance divided by the fuel used while the asset was in motion. Idle fuel is excluded. Potential MPG – This is a simulated MPG achievable by a perfect driver that has 100% efficiency. Moving Potential MPG – This is a simulated moving MPG achievable by a perfect driver that has 100% efficiency. Operator Efficiency – This is the difference between the MPG and potential MPG as a percentage of the total calculated fuel used. Includes idle fuel used. Driver Efficiency – This is the difference between the MPG and potential MPG as a percentage of the total calculated fuel used. Does not include idle fuel used. $/mi – The cost of fuel lost per mile due to inefficient driving. Total Loss – The total cost of fuel lost due to inefficient driving during the range of time specified. Avg RPM – The average RPM the asset was at during the range of time specified. This is weighted by distance. OverSpeed Avg – The average speed of the asset when the asset is traveling over the speed threshold. This is weighted by distance. Top Gear – Percentage of miles traveled while in top gear. Total Cruise – Percentage of miles traveled while cruise control was engaged. Achievable Cruise – Percentage of total miles traveled above 55mph, which is the maximum cruise usage potential. Outside SweetZone – Percentage of total miles traveled with an RPM outside the SweetZone. This is custom-defined; the default is 1100-1350 RPMs. Idle Fuel (g) – The total amount of fuel burned while the asset was idling. Idle Minutes – The total number of minutes the asset was idling. |
| Asset No | Displays the assigned asset ID. Click Info  to view asset details. |
| Operator Efficiency | Click percentage  to open the Efficiency Details tab displaying both the Operator Efficiency and the Driving Efficiency that are available through the pop-up in the main ZFuel report.The calculations are the same for both the Operator and Driving efficiency scores, however the Driving Efficiency score does not include idle fuel used in the calculation of the percentages used to factor the efficiency. Includes idle fuel used.  |
| Driving Efficiency | Click percentage to open the Efficiency Details tab displaying both the Operator Efficiency and the Driving Efficiency that are available through the pop-up in the main ZFuel report. The calculations are the same for both the Operator and Driving efficiency scores, however the Driving Efficiency score does not include idle fuel used in the calculation of the percentages used to factor the efficiency. Includes idle fuel used.  |
Single Asset View
- Click an asset number in the results table, and the same columns of data will appear for that asset only, displaying data for each day during the date-range you defined.
This is the same view that is displayed if a specific asset was selected in the main report filter instead of selecting All Assets.
- Click a day to identify the source of calculations on a specific day.
- Click Operator Efficiency
to open a pop-up summary of the percentages used to factor the efficiency. Includes idle fuel used.
- Click Driving Efficiency
to open a pop-up summary of the percentages used to factor the efficiency. Does NOT include idle fuel used.
- To navigate back to the previous results table, in the top-left corner click the Breadcrumbs; for example, click All Assets.
Using the browser’s Back function will exit to the home page.
Single Day View
Click a specific day in the single asset view, the same columns of data will appear for each day. The same data appears for each trip during the selected day for the single asset.
A Trip is defined as the time between a Key-On and a Key-Off event. 
The results table display the following information:
| MPG |
Click the MPG value to open an MPG Details map view displaying the MPG along the path for the trip. The asset is displayed along the path at the location selected in the Graph. The trip path is color-coded based on the High(Green), Medium (Yellow), and Low (Red) MPG. On the MPG Details map, click the tabs to toggle indicators on the map along the path: |
| Fuel (G) | Click this value to view the Fuel Details tab. The asset is displayed along the path at the location selected in the Graph.  Zoom options: click to adjust the amount of time in 10-minute increments displayed on the graph. The graph is located just under the Zoom toggle. Fuel Level Graph: displays a graph view of the entire trip. The x-axis represents the time frame selected in the data selector at the bottom and the y-axis is the fuel tank level in percentage. Click and drag anywhere on the graph to zoom in on the selected range of time. Fuel Level Graph: data selector—click options to toggle the graph view between fuel level percentage and altitude. Current position: hover your mouse on the graph to displays additional information along the trip and the location on the map where the information was recorded. Time Slider: click and drag to adjusts the amount of time displayed in the graph. |
| Driving Efficiency | Click the Driving Efficiency value to open the efficiency graphs for the trip:  |
| Operator Efficiency | Click the Operator Efficiency value to open the efficiency graphs for the trip:  |
| AvgRPM | Click the AvgRPM value to open the Histogram Details tab displaying graphs of the time and distance in both RPM and Speed ranges.  RPMs: The RPM bar graph shows the total distance and total time spent in each of the ranges of RPMs (100 RPM Increments). MPH: The MPH bar graph shows the total distance and total time spent in each of the ranges of speed (5 MPH Increments). |
| OverSpeed Avg | Click the OverSpeedAve value (any speed value) to open the Speed Details map view displaying the associated average miles driven over the average seed, and whether an asset was traveling above or below the OverSpeed limit during a specific trip. The asset is displayed along the path at the location selected in the Graph. The path is color-coded based on whether the asset was above (Red) or below (Blue) the OverSpeed Limit.
Speed uses the OverSpeed Limit when factoring the amount of fuel that could have been saved by not speeding. This limit is set in the ZFuel admin section.  Lost Fuel: pie chart displaying the breakdown of the calculated fuel used above and below the OverSpeed Limit. Zoom selector: toggle the amount of time displayed in the graph in 10-minute increments. Speed Graph: displays a graph view of the entire trip. The x-axis is the speed of the asset and the y-axis represents the data selected in the data selector at the bottom. Click and drag anywhere on the graph to zoom in on the selected range of time. Data Selector: click each option to toggle the view of additional data on the graph. Options include: MPH, Over, Downhill, and Alt (Altitude). Slider: click and drag the slider to adjust the amount of time displayed in the graph. Current Position: hover your mouse over the graph to display additional information along the trip and show the location on the map where the information was recorded. Fuel Statistics: the table displays the current part of the route being viewed in the graph. Adjusting the graph refreshes the data in and below the chart. The chart also displays the amount of time that would be added to route if the asset had not exceeded the threshold. If a trip included travel downhill, which is defined as less than -1% road grade, these portions of the trip will not be included in the calculations and will be indicated on the graph by a purple line. |
| Top Gear | Click the TopGear value to open the Gear Details map view displaying whether the asset was in or outside Top Gear during a specific trip. The asset is displayed along the path at the location selected in the Graph. The path is color-coded based on whether the asset was in Top Gear(Red) or not in Top Gear (Blue).  Percentage: displays the percentage and distance traveled while in Top Gear. Zoom Selector: Quickly adjust the amount of time displayed in the graph in ten-minute increments. Gear Graph: displays a graphical view of the entire trip is displayed. The x-axis is the gears of the asset and the y-axis represents the data selected in the data selector at the bottom. Click and drag anywhere on the graph to zoom in on the selected range of time. Data Selector: click each option to toggle the data that appears on the graph; Gear, Top, Alt (Altitude), MPH, and RPM. Slider: click and drag the slider to adjust the amount of time displayed in the graph. Current Position: hover your mouse over the graph to display additional information along the trip and show the location on the map where the information was recorded. Fuel Statistics: table displays data reflecting the current part of the route being viewed in the graph. Adjusting the graph refreshes the data in and below the chart. |
| Total Cruise | Click the Total Cruise value to open the Cruise Details map view displaying whether cruise control was used, could have been used, and was not used during a specific trip. The asset is displayed along the path at the location selected in the Graph. The path is color-coded based on whether the asset had cruise enabled (Red), could have potentially used cruise (Green), and where cruise was unavailable (Blue).
Cruise uses the Cruise Limit when factoring the percentage of miles that cruise could have potentially been used. This limit is set in the ZFuel admin section.  Miles Traveled: displays a pie chart breakdown, Actual tab of the driver’s actual performance. Click Optimal to view where cruise could have been used. Zoom selector: toggle the amount of time displayed in the graph in 10-minute increments. Cruise Graph: displays a graph view of the entire trip. The x-axis is the speed of the asset and the y-axis represents the data selected in the data selector at the bottom. Click and drag anywhere on the graph to zoom in on the selected range of time. Data Selector: click each option to toggle the data that appears on the graph; MPH, Over, Downhill, and Alt (Altitude). Slider: click and drag the slider to adjust the amount of time displayed in the graph. Current Position: hover your mouse over the graph to display additional information along the trip and show the location on the map where the information was recorded. Total Fuel Cost: table displays fuel expense data for the current part of the route being viewed in the graph. Adjusting the graph refreshes the data in and below the chart. |
| Outside Sweet Zone | Click the OutsideSweet Zone value to open the RPM Details map view displaying whether the asset was in or outside the SweetZone during a specific trip. The asset is displayed along the path at the location selected in the Graph. The path is color-coded based on whether the asset was inside (Blue) the SweetZone or outside (Red) the SweetZone.
RPM uses the SweetZone when factoring the percentage. The SweetZone is set in the ZFuel admin section. Percentage: displays the percentage and distance traveled while outside the SweetZone.Zoom selector: toggle to adjust the amount of time in 10-minute increments displayed in the graph. RPM Graph: displays a graph view of the entire trip. The x-axis is the RPMs of the asset and the y-axis represents the data selected in the data selector at the bottom. The yellow area indicates the SweetZone range. Click and drag anywhere on the graph to zoom in on the selected range of time. Data Selector: click each option to toggle the data that appears on the graph; RPM, Ex RPM (Excluded), Downhill, and Alt (Altitude). Slider: click and drag the slider to adjust the amount of time displayed in the graph. Current Position: hover your mouse over the graph to display additional information along the trip and show the location on the map where the information was recorded. Fuel Statistics: displays values in the chart reflecting the current part of the route being viewed in the graph. Adjusting the graph refreshes the data in and below the chart. |
| Idle Minutes | Click the Idle Minutes value to open the Idle Detail map view displaying the amount of time spent idling and the amount of fuel lost during a specific trip. The location of the idle is displayed on the map and indicated by the ‘i’ icon.  Totals: displays the total fuel lost and idle time for this idling event. Idle Chart: displays the amount of time and fuel lost due to idling in relation to the Air and RPMs. Data Selector: click each option to toggle the data that appears on the graph; TimeLoss, Fuel Loss, Avg RPM, and Air Temp. Pop Up: hover the mouse over the chart to display the data for the idle. Idle Gallons/Hour Diagram: displays an estimated amount of fuel burned at varying RPMs and includes the average RPM during the idle event. Additional information calculated includes the actual GPH burned and the Average RPM during the idle. |
| (O) | Indicates when a trip ends on the next day (after 12:00am). |
To navigate back to the previous results table, in the top-left corner click the Breadcrumbs; for example, click the single Asset: # or click All Assets.
Using the browser’s Back function will exit to the home page.