Castrol
Castrol 15ACBF Heavy Duty Multipurpose Automatic Transmission Fluid 5-Gallon Pail
Castrol 15B5C9 Assuron SAE 30 Monograde Heavy-Duty Diesel Engine Oil 5-Gallon Pail
Castrol 14A845 Pyroplex Red EP 2 High Temperature Lithium Complex Grease 120 lb Keg
Castrol: Over a Century of Lubrication Innovation
Few names in the automotive world carry the heritage and engineering credibility of Castrol. Founded in 1899 by Charles Cheers Wakefield in England, the company began as C.C. Wakefield & Co. and quickly earned a reputation for pushing lubrication technology to its limits. The brand name itself tells the story: researchers discovered that blending castor oil into their formulations delivered the properties needed to handle the punishing demands of early internal combustion engines, and "Castrol" was born.
From its earliest days, Castrol was synonymous with performance at the extremes. During the 1920s and 1930s, the land speed record was broken 23 times — and 18 of those record-setting runs relied on Castrol lubricants. That heritage of high-stakes testing has never stopped, with Castrol products going on to support everything from Formula 1 teams to NASA Mars Rover missions. This motorsport and engineering pedigree isn't just marketing — it directly informs the chemistry behind every product the company makes.
Today, Castrol operates as a global lubricants leader present in more than 150 countries, offering products for automotive, industrial, marine, and aerospace applications. Its product lineup has grown well beyond traditional motor oil to cover the full spectrum of vehicle fluid needs. The flagship Castrol engine oil range includes iconic lines like EDGE, MAGNATEC, and GTX — each engineered for different driving styles and engine types, from everyday commuters to high-revving performance machines.
MAGNATEC, introduced in 1996, brought intelligent molecule technology to engine protection, with molecules that cling to critical engine surfaces and provide a protective layer the moment the engine starts — addressing the wear that occurs during cold starts before oil fully circulates. EDGE, Castrol's top-tier fully synthetic line, is formulated with fluid titanium technology to maximize film strength under extreme pressure. Meanwhile, the classic GTX line, launched in 1968, remains one of the most recognized motor oil brands in history.
Beyond the crankcase, Castrol's expertise extends to the entire drivetrain. The Castrol automatic transmission fluid lineup — marketed under the Transmax name — covers step-type automatics, CVTs, and dual-clutch transmissions, with formulations licensed by GM, Ford, Chrysler, and major Japanese OEMs. The proprietary Smooth Drive Technology™ uses active control molecules that adjust friction behavior under changing pressures and speeds for a consistently smooth driving experience.
Castrol also engineers specialized brake fluid formulas for both street and track use. The React line, including the high-performance React SRF Racing formula, is designed to maintain a stable boiling point under the intense thermal stress of hard braking — a critical safety characteristic whether you're navigating mountain switchbacks or lapping a circuit.
With more than 125 years of research, real-world racing data, and OEM partnerships driving its formulations, Castrol stands as one of the most trusted names in automotive lubrication — a brand where performance history and everyday reliability are built into every bottle.