Hi Levi,
We detail the fuel consumption on all of our generators. You can find this by clicking the Specifications tab on any product page.
Pramac 32kVA Three Phase Perkins Diesel Generator:  Fuel Consumption 75% / 100% PRP L/h 5.41 / 7.1
Pramac 48 kVA Three Phase Perkins Diesel Generator:   Fuel Consumption at 75% / 100% PRP 217.6 g/kWh / 213 g/kWh
Pramac 83kVA Three Phase Perkins Diesel Generator:  Fuel Consumption at 75% / 100% PRP L/h 13.4 / 17.9
Kind Regards, Paul