feed it synthetic motor oil for its entire life to avoid issues with its more complex engine down the line. You can choose between Castrol EDGE and GTX Full Synthetic depending on your budget.

Engines need motor oil to run smoothly ... innovation in synthetic motor oils, Castrol offers a range of high-performance products, including the popular EDGE and GTX lines.

Castrol and RFK Racing co-owner Brad Keselowski unveil new No. 6 Ford design underscoring Castrol's superiority in motor oil performance ... Protection" (EDGE), and "Superior Protection" (GTX ...