Please note, you need to upgrade the database before using this version.
Select Settings -> Select the Fuel
Types screen -> Create the desired values
Select Settings -> Select the Fuel
Units screen -> Create the desired values
The system will use Gallons (US) as the default unit. You can select a different default unit for the system to display when creating Fuel.
However, you can only use one single unit for any fuel type. Therefore, if the unit you change might affect old data (e.g., from liters to barrels), you need to ensure the old data has been converted to the correct unit's figures, as this will also affect your reports