India, April 18 -- Tanker owners and oil traders responded warily after Iran said on Friday that the Strait of Hormuz is open to all ships - a statement that, if true, will free up millions of barrels of crude oil and fuel stuck inside the Persian Gulf. Many said Iran's statement lacked detail, and that they would wait and see how it works out in practice. People familiar with the thinking of some large producers in the region also expressed caution. Shipowners said that so far, no one wants to be the first to find out whether the route really is safe and fully open. P15...