Oil conditioner is applied to the lane in a pattern which affects ball reaction as it goes down the lane. Originally oil was put on the lanes to protect the surface from damage, but by spreading it uneven across the lane it becomes bowling oil pattern. Oil pattern becomes even more important part of the sport with usage of "lane machine" and bowling players must continuously adjust their methods and strategies to be the best on the challenging lane conditions. The most sport oil patterns are done by Kegel and Brunswick, so it's very important that bowling players can read Oil patterns program sheets.

Check the Kegel webinar: How to read a program sheet by John Janawicz.