2800kms around Tassie, a rough mix of 20% freeway, 40% main/windy/coastal roads, 20% main dirt roads, 20% beach or low range 4wd tracks. Fully loaded rb30 patrol wagon on 35's with 4.3's, average 19.3L per 100kms for the trip. Pretty happy with that considering I'm generally putting the boot in and she was fully loaded!