This depends entirely on the capacity of one’s fuel tank. In the desert petrol engines (it varies from make to make) use one litre of fuel to travel 2.5 to 4 kilometres. Diesel-driven vehicles manage 4-5 km per litre. Though the desert-crossing section of the tour (550km) is designed to be managed on one full tank of fuel, the rule of thumb is “better safe than sorry” so bring along a few extra litres in the event of an unforeseen event or emergency.
