Mate our v8 cruisers at work chew oil. More when there putting around than working hard.. Keep an eye on your alternator. We work 0n 90% dirt roads and due to the position the placed the alternator they seem to fill up with dirt and self distruct! We get an avarage of 2000 - 15000km out of an alternator! Floging the ***** off my lc200 ttd in the mines i use 1-1.25lt of oil every week. its only 3mths old but we have done 25000km in it and the oil consumption does not seem to be easing up. BTW where are you getting your alternaters from ?