Australian oil companies are being accused of profiteering off the war in Iran as the average price of unleaded petrol surges well past $2 a litre in Sydney, Melbourne and Brisbane today.Half of the petrol stations in Melbourne today are charging 219.9 cents a litre, while half in Sydney have raised prices to between 217.9 and 223.9 - well in excess of the expected top of their price cycles.Brisbane had the highest average unleaded price of the three capitals, at