Mate i've owned a '98 4.5ltr Auto Petrol 100 series for the last 7 yrs or so, never let me down, yep it does like a drink, but all big 4x4's do, looking at averages between diesel variants there's not a whole lot of difference in overall fuel consumptions....... plus at the time it was $10 - $15,000 cheaper then the same model in diesel.
Every now and then i think, "geez i'm getting a bit tired of the fuelling this big girl up" and i dare to go looking at alternatives, i sit in a few other cars, and they all feel like i'm taking a step down in comfort, room etc....... so back to the Cruiser i go.....
Good luck!