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In torture tests, Castrol SYNTEC 5W30 maintained maximum horsepower 29% longer than the leading conventional 5W30 oil. Visit the official Castrol SYNTEC Website, for more information.

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Synthetic formulas can be engineered to meet tough performance targets, and wider grade ranges, that can't be delivered with conventional motor oils. Synthetics help keep engines cleaner longer.

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Looking for the real story on synthetics? Wondering what's true and what's not? This site helps you to set the record straight.

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Formulas for synthetic motor oil can be engineered to meet tough performance targets. See the many key benefits of Castrol SYNTEC.

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Every car is made different. Don't use the same synthetic oil in your vehicle. Explore the available grades of Castrol SYNTEC.

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Great site showing 2 cars going head to head on a dyno! One has Castrol SYNTEC, the other has conventional motor oil. Which motor oil sustained maximumn horsepower longer?

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See all the great videos and sponsorships from Castrol SYNTEC

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