The agreement, which covers a wide product category including lubricants, oils and fuels, completes the global sponsorship programme 20 months ahead of the event.
Castrol joins a number of global sponsors for Uefa Euro 2008, which includes Carlsberg, Coca-Cola, JVC, Hyundai-Kia, MasterCard, McDonald's and Adidas.
The conclusion of the global marketing programme sales means Uefa will continue to focus on the national supporter programme packages for Austria and Switzerland.
UBS in Switzerland and Telekom Austria and Osterreichische Post AG in Austria are currently signed as national supporters.
Lars Christer Olsson, Uefa CEO, said: "The addition of Castrol proves what a strong property the Uefa Euro championship has become in the global sports market. It is the second biggest sporting event globally in terms of TV viewers and continues to attract massive participation and involvement from fans and non-fans alike."
Roy Williamson, European marketing director at Castrol, said: "Our new relationship with football via Uefa Euro 2008 will give Castrol the opportunity to develop business building opportunities in a way that will add value to our business partners, excite and reward our consumers and motivate staff."
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