Skip to content
THE ORIGINAL BRITISH MOTOR OIL SINCE 1899
UK motor factor or workshop?Visit our trade website (opens in a new tab)
Classic OilsClassic Q Range

Classic Q SAE 40

A monograde mineral oil for classic petrol and diesel engines, with a low-detergent formula for vintage engines without full-flow oil filtration. Why choose this oil

ViscositySAE 40
Oil TypeMineral
Specifications
  • API SD/CC
Available in

Why choose Classic Q SAE 40

Duckhams Classic Q SAE 40 is a high-quality monograde mineral engine oil designed for classic petrol and diesel engines requiring SAE 40 viscosity and API SD/CC performance. It provides dependable wear protection, sludge control and thermal stability. Its low-detergent formula makes it ideal for vintage engines without full-flow oil filtration, helping preserve engine condition and authenticity.

  • Monograde mineral oil for classic petrol and diesel engines.
  • Dependable wear protection that helps extend engine life.
  • Sludge control that helps keep internal parts clean.
  • Thermal stability for consistent lubrication.
  • Suited to classic vehicles driven in moderate to warm conditions.

Typical physical characteristics

PropertyUnitTypical Value
Viscosity40
Density @ 20°Cg/cm³0.877
KV100cSt13.8
KV40cSt124.8
VI107
CCScPN/A
TBNmg KOH/g5
Sulphated Ash%1.5
ColourClear Amber
Flash (Closed)°C233
Pour Point°C-33

Typical physical characteristics are provided as an indication of properties based on current production data only, and should not be interpreted as a specification.