Penrite Classic Medium 25w-70, 5 Ltr

Penrite Classic Medium 25W-70 Engine Oil (Formerly HPR40)

Maximum protection for larger, high-value classic engines

Penrite Classic Medium is a premium mineral 25W-70 engine oil, expertly formulated for classic engines manufactured between 1950 and 1989. Previously sold in the UK as HPR40, this oil is designed to deliver superior protection, especially for larger capacity and luxury classic engines where maintaining oil pressure is critical.

Ideal for prestigious marques and rally-prepared classics, it offers enhanced wear protection and performance compared to traditional SAE 40 monograde oils or lighter multigrades like 20W-50.

Key Benefits

• Designed for Classic & Luxury Engines
  Tailored for older engine designs requiring higher viscosity and strong oil film strength.
• Superior Wear Protection
  High ZDDP (1610 ppm) provides essential protection for flat tappet camshafts and internal components.
• Maintains Oil Pressure
  Higher viscosity at operating temperature helps maintain oil pressure in worn or high-mileage engines.
• Controls Oil Consumption
  Reduces burn-off and leakage in engines with larger clearances.
• Excellent Alternative to SAE 40
  Offers better cold start performance and overall protection than traditional monograde oils.
• Lay-Up Protection
  Includes corrosion inhibitors and tackiness additives to protect internal components during storage.

Recommended Applications

• Classic cars (1950–1989)
• Large capacity and luxury engines
• Vehicles originally specifying SAE 40
• Engines needing improved oil pressure and reduced consumption

Specifically recommended for:

• Rolls-Royce Silver Wraith, Silver Dawn, Phantom IV, V & VI
• Silver Cloud I, II & III
• Silver Shadow & Silver Shadow II
• Bentley Mk VI, R Type, S1, S2, S3 & T Type

Technical Specifications

Why Choose Penrite Classic Medium?

Penrite Classic Medium is engineered for engines that demand stronger oil films and higher pressure stability. Its thicker viscosity and high zinc formulation make it ideal for protecting valuable classic engines under both road and rally conditions, particularly where wear, oil consumption, or pressure loss are concerns.