DUBAI (Reuters) - Saudi Aramco is establishing a domestic fuel retailing subsidiary as part of the national oil company's drive to expand beyond crude oil production into downstream businesses.The new firm, Saudi Aramco Retail Co, will create a network of filling stations within Saudi Arabia to sell automotive fuels, Aramco said on Wednesday, without giving details of the size, cost or time-frame for the network.In April, Aramco said it had signed a memorandum of understanding with French firm..