im using f-150 (4.6 SOHC 16V V8) as my company service way back 2000, its average is 4-6 km/l..the new expedition (5.4 SOHC 16V V8) has a higher displacement so expect fewer mileage..around 4-5 km/l... since its 2nd hand..maybe less..

if you find this not "gas-oholic".go for it..