If you're unable to view the Vehicle Fuel Type field when viewing or editing car details on My Primary Car widget, this is because the parameter which controls the field is disabled.
To control whether the field is visible or not, follow the steps below in Portal.
From the dashboard menu, select Administrator Dashboard.
Click Admin Tools, then click Admin Settings.
In the Search field, enter the relevant parameter:
If UK based - search for ex_veh_hide_hmrc_type.
If Ireland based - search for 'ex_veh_hide_fuel_type'.
Click Edit, then set the value to either
Y: The field option will be hidden.
N: The field option will be visible.
Click OK.