Bardahl Classic SAE 40 Mineral Engine Oil provides reliable lubrication for vintage petrol engines built between 1900 and 1950. It is formulated with 100% mineral base oil to suit early engine designs and traditional seal materials such as paper, felt and fabric, helping you maintain consistent performance and minimise oil consumption.
Discover the key features of this engine oil:
- 100% Mineral Base Oil: Formulated from pure mineral oil without synthetic additives, this single-grade lubricant offers the correct viscosity and lubrication behaviour for early engine designs, providing smooth operation and reducing mechanical wear for engines requiring period-appropriate oils.
- Seal Compatibility: Engineered for paper, felt and fabric seals used in early engines, this formulation prevents degradation and leakage, ensuring oil retention and long-term seal protection for dependable operation over time.
- Anti-Wear Additives: Contains carefully balanced anti-wear components that form a protective layer on metal surfaces, reducing friction between moving parts and maintaining internal cleanliness for longer engine life.
- All-Seasons Protection: Designed to maintain stable viscosity across a wide temperature range, this oil ensures consistent lubrication during cold starts and sustained performance in warmer running conditions.
This oil helps you preserve the authenticity and reliability of classic petrol engines while keeping mechanical components well-protected and properly lubricated. Its period-correct formulation makes it a practical addition to your maintenance setup, offering dependable protection and smooth running for classic engines maintained with care.