After two months training in the islands around Pearl Harbor, "Silverstein" got underway for the Western Pacific Ocean. She made overnight stops at Eniwetok and Saipan and arrived at Guam on 14 January 1945. The next day, she and stood out of Apra Harbor, Guam, bound for Ulithi. Upon entering that harbor in the Carolines, "Silverstein" commenced upkeep. From Ulithi, she sailed for Eniwetok on 1 February, arrived four days later, and joined the logistics support group of the U.S. 5th Fleet. She remained there until the 9th when she sortied with a group of oilers to join the main replenishment group, Task Group 50.8, at that time refueling and rearming the Fast Carrier Task Force which, in turn, was in the process of pounding Iwo Jima.