TF 3.0 L manual transmission: about 540 km from 60 L of LPG. Cannot remember that last time we used a full tank of petrol. Mostly long distance country running. Best ever 640 km from 65 L of gas, worst about 500 km. Most running ia at 100 - 110 km/hr, although one trip in outback Qld got us nearly 10 L/100 km @125+ km/hr. I erckon it should do better than that but it never has.