Castrol EDGE Performer of the Month

Just who has been the world's best driver over the month? Who has had the most wins, the most pole positions? In short, who is hot and who is not?

Has Sebastian Vettel's Formula 1 form exceeded that of World Rally Champion Sebastien Loeb? Has Jimmie Johnson or one of his NASCAR Sprint Cup rivals hit a purple patch on the ovals, or is Dario Franchitti the in-form driver in the USA?

Castrol EDGE Performer of the month answers this question.

What is the Castrol EDGE Performer of the Month?

Rarely does a driver produce the perfect season. Often in motorsport, as in most sports, it is the individual who performs at a high level most consistently that walks away with the accolades at the end of the year.

But where Castrol Rankings differs from championship standings is that it constantly changes, measuring on a rolling basis a driver's form over the last 12 months.

With Castrol Edge Performer of the Month we can focus on drivers' more immediate performance levels - to highlight a run of strong performances at any point of the season. Take last August, during which Formula 1 world champion Jenson Button failed to finish higher than seventh in the two grands prix run, while Kimi Raikkonen - who had a difficult season by his own standards - scored a victory and a podium.

How does it work?

The Castrol Rankings will measure each driver's competitive level on a monthly basis, to produce the Castrol EDGE Performer of the Month - highlighting those inevitable purple patches and dips in form.

The Castrol Rankings uses the same objective analysis of drivers' performance but measures it over a one month period, instead of 12, taking into account all race or rally results during that time. It then balances out and weights the results to ensure equality across different disciplines, to produce the Castrol EDGE Performer of the Month.