Motul Classic SAE 50 – Mineral Monograde Oil for Pre‑1950 Engines

Overview:
Motul Classic SAE 50 is a mineral monograde engine oil specially formulated for early 20th‑century 4‑stroke gasoline or diesel engines—and compatible gearboxes—built before 1950.

Key Features & Benefits

• High-Zinc Anti-Wear Additive:
  A ZDDP content over 1800 ppm provides strong protection for flat tappets and high-lift cams common in vintage engines.

• Low Detergent, High Compatibility:
  Designed with minimal detergent to preserve paper/felt/gasket seal integrity and avoid dislodging debris. Safe on non-ferrous parts like brass, bronze, and copper.

• Monograde for Tight Sealing:
  The “straight 50” viscosity improves sealing with wide-tolerance pistons, resists shear-thinning (no polymers), and reduces leaks in older engines.

• Easier Cold Starts:
  Designed for engines sitting idle long periods—enhanced film adhesion supports smoother start-ups.

• Break-In Suitable:
  Ideal as a break-in oil when changing filters or during initial runs; recommended annual draining.

Ideal Applications

• Antique & Vintage Vehicles:
  Designed for “ancestor,” “veteran,” and pre‑war cars, motorcycles (including early Harleys and BMWs), and machinery using SAE 50 oil.

• Gearbox-Compatible:
  Suitable for old integrated transmission units.

• Climate Adaptability:
  Performs reliably in various temperatures, for engines stored or used seasonally.

Bottom Line

Motul Classic SAE 50 is a faithful mineral oil recreation of traditional straight-grade SAE 50, enhanced with modern anti-wear additives yet gentle on period components. Ideal for pre‑1950 engines with wide bearing clearances and sensitive seals, offering reliable protection, smoother starts, and uncomplicated maintenance.