Motorists are finally seeing some relief at the petrol pump after the cost of crude oil falls 20 per cent this month. width=device-width, initial-scale=1, shrink-to-fit=no" name="viewport"/>Petrol prices Australia: Service stations start cutting prices amid claims US-Iran war is winding down. Petrol, Diesel Price Cut: After weeks of uncertainty triggered by the Middle East conflict, motorists finally have some reason to cheer. Private fuel retailer Nayara Energy has cut petrol prices by.