I wasn't a "tanker", but I can provide a little history on your dad's unit.
It went overseas from NY P/E 7 Jun 44, arriving England 14 Jun 44; landed France 11 Aug 44; crossed into Belgium 26 Sep 44; entered Holland 8 Oct 44; returned to Belgium 28 Dec 44; entered Germany 15 Mar 45;arrived Hampton Roads, VA P/E 9 Oct 45; inactivated at Camp Patrick Henry, VA 9 Oct 45.
Campaigns: Northern France25Jul44-14Sep44 Rhineland15Sep44-21Mar45 Ardennes-Alsace16Dec44-25Jan45 Central Europe.22Mar45-11May45
Casualties: Killed in Action898 Wounded in Action3,811 Died of Wounds200
Commanders: MG Lindsey McD. SilvesterMar-42 MG Robert W. HasbrouckNov-44 BG Truman E. BoudinotSep-45
The 7th. Armored Division has a very interesting combat narrative, as would the 87th. Calvary Reconnaissance Squadron, Mechanized, I'm sure.
My reference for the above: "World War II Order of Battle" Shelby L. Stanton, author Galahad Books, NYNY, publisher.
The various companies are not spelled out, and Col. Boylan is not mentioned. You may want to try calling up <7th Armored Division Association>. They may be able to provide "more light".