Classic Castrol 1926A 40 Engine and Gearbox Oil, 4.54 Liter, XXL

AUTHENTIC SAE40 MONOGRADE FORMULATION: Castrol Classic XXL40 is a true monograde engine oil, engineered specifically for vintage engines that require consistent viscosity and minimal detergent content. Its SAE40 rating ensures stable performance under both road and competition conditions, making it ideal for classic vehicles with older lubrication systems. DESIGNED FOR PRE-1950 CARS AND PRE-1970 MOTORCYCLES: This oil is tailored for engines built before modern multigrade oils became standard. Whether you're maintaining a pre-war saloon, a post-war British twin, or an early American flathead, XXL40 provides the correct period-specific lubrication your engine was designed for. SUITABLE FOR ENGINE AND GEARBOX LUBRICATION: In addition to engine use, Castrol XXL40 is recommended for gearbox applications in many classic motorcycles. Its monograde consistency and additive profile make it compatible with older gear designs that rely on splash or total-loss lubrication systems. PREMIUM MINERAL BASE WITH SELECTED ADDITIVES: Formulated using high-quality mineral oils and carefully chosen additives, XXL40 offers excellent film strength, corrosion protection, and wear resistance without compromising the authenticity of vintage engine operation. It avoids aggressive detergents that can disrupt sludge balance in older engines. ICONIC CASTROL PACKAGING IN 5-LITER TIN: Supplied in a classic-style 5-liter tin, this product not only performs like the original Castrol oils of the era-it looks the part too. Ideal for display in workshops, garages, or as part of a collector’s shelf, the packaging evokes Castrol’s rich motorsport and engineering heritage.