The rules that use the vocabulary item "fuel" are:

<xlevel_item>

fuel

<specific_vehicle_type-sing>

five ton fuel

hemtt fuel

<specific_vehicle_type-creatable-sing>

five ton fuel

hemtt fuel

<specific_vehicle_type-not_creatable-sing>

five ton fuel

hemtt fuel

<specific_vehicle_type-not_creatable>

five ton fuel

hemtt fuel