After V Shanmugam's 23rd minute goal put IOB ahead, India star and penalty corner specialist Raghunath came up with a fine hat-trick to enable Indian Oil, the joint winners of 2012 edition, log home full points.
In another pool A match, Punjab National Bank notched up a hard-fought 2-1 win over fancied Bharat Petroleum. Jalwinder struck twice in 28th and 36th minute to give his side a comfortable lead only to see a late fightback by BPCL for whom Amar Aiyamma found the back of the net in the 63rd minute.
SAIL stepped up the pace in the second half as Baa scored in the 39th to draw parity before Rajin Kandulna (42nd, 67th) and Deepak Kullu (62nd) swelled the scoreline.