It's More Than Just Oil. It's Liquid Engineering is the advertising slogan or punchline of Castrol, used mainly for branding its engine oil products.[1][2] Castrol products are still marketed under the red, white and green colour scheme that dates from the launch of Castrol motor oil in 1909. Advertisements for Castrol oil historically featured the slogan "Castrol - liquid engineering"; this was more recently refreshed and reintroduced as "It's more than just oil. It's liquid engineering." In 2008, this slogan was also being featured as the name for a new rewards club called the Castrol Liquid Engineering Crew in which members get the chance to win prizes.
For many years, the opening notes of the second Nachtmusik movement of Mahler's Seventh Symphony were used as the signature theme of Castrol TV commercials.[3]
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