Rock Oil Guardian 10-40w 4 Litre
Guardian Motorcycle 10W40

GUARDIAN Motorcycle 10W40 semi-synthetic engine oil is premium grade 4 stroke engine oil that meets the exacting demands of modern high performance motorcycle engines.

  • Advanced additive, high detergent formulation ensures maximum engine component protection and superior resistance to deposits and corrosion, resulting in extended engine life and optimum performance under the most arduous of conditions
  • Rapid cold start circulation, providing maximum protection during initial start up
  • Passes crucial clutch friction test required to meet the JASO MA/MA2 specifications, allowing safe, predictable use in wet clutch applications
  • Reduced phosphorous level to ensure excellent compatibility with catalysts now fitted to the latest motorcycles

The Guardian Motorcycle 10W40 engine oil meets or exceeds the following specifications:


Typical Physical Characteristics


Viscosity Grade (SAE) 10W-40
Density @ 15C 0.871
Viscosity @40C (cSt) 105.0
Viscosity @100C (cSt) 15.5
Viscosity Index 156

Rock Oil Guardian 10-40w 4 Litre