The choice is easy, choose the Ebonite Choice bowling ball. Ebonite took the proven Centrex Symmetrical Mass Bias core and adjusted the shape to lower the differential and introduce the Mod-1 Core. This core creates easy length through the front of the lane and allows for great continuation down lane. The Choice combines this core with the GSV-1 coverstock which is a decendent of the coverstocks used in the successful Game Breaker series of bowling balls. This high performance bowling ball is a great choice for heavy oil.