Castrol performance index
The Castrol performance index is a ranking system created by Castrol for men's club association football as part of a sponsorship package with FIFA. The system uses mathematical formulas which evaluate various player performance in terms of how individual actions either assist or prevent goals. The system takes into account the strength of the opposition and the time in a game the player's actions occurred. Castrol publishes several rankings: players in top five European leagues monthly during a season, MLS player ranking and international tournament rankings. Castrol became the official oil lubricant of FIFA in  2008. It published a ranking in UEFA Euro 2008. It was an official sponsor the 2010 FIFA World Cup in South Africa and an index measuring World Cup player performance was updated after each round of matches. Castrol made a ranking in Euro 2012 and the 2013 FIFA Confederations Cup. Castrol index ranking. The Castrol Index is a rolling ranking system that measures performance of every football player across Europe's top five leagues during the course of a 12-month period. Rankings are published monthly. To get Castrol Index Ranking, first "Castrol Index Score" is calculated for every player  in every league and Champions league match, then the score weighted to get "Castrol Ranking points", and lastly, cumulative points from every match during the 12-month period are multiplied with 90 and divided by total minutes played. Weightings are different in every league and are adjusted after every season by strength of every league. For example, Champions league knock-out stage has biggest weight. Top-rated players. Since the beginning of the ranking, September 2009, there have been three players in the top position. EDGE Performance of the Month. Castrol awards every month an "EDGE Performance of the Month