Home > Anglomoil Roadmaster 300 CI-4 Diesel Engine Oil from Anglo Design

Anglomoil Roadmaster 300 CI-4 Diesel Engine Oil from Anglo Design

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Anglo Design  offers the Anglomoil Roadmaster 300 15W/40 diesel engine oil that meets the API CI-4/SL specification.  

Roadmaster 300 diesel engine oil has been registered with Mack Trucks for EO-M Plus approval and Cummins for compliance with CES 20076, 20077 and 20078 specifications.  

Roadmaster 300 is suitable for use in all European heavy duty diesel engines complying with the latest Euro 4 exhaust emission legislation.  

Anglomoil Roadmaster 300 diesel engine oil has a unique formulation that provides a high Total Base Number (TBN) indicating high alkalinity, which is essential for combating corrosion from high sulphur found in some countries.  

Anti-pollution legislations in the US, Europe and Japan continue to drive engine oil specifications. These specifications are closely aligned in most countries since the legislation shares a common aim.  

The new heavy duty diesel oil specification introduced recently in Europe, ACEA E7-04 is recognised as a leading global standard of performance. ACEA E7-04 is a combination of European and American test procedures.  

The new Cummins Engine Co. oil specification, CES 20077 includes ACEA E7-04 amongst its requirements.  

The Japanese Automotive Standards Organisation (JASO) DH-1 specification addresses the performance requirements of Japanese-designed engines.  

Meeting the most stringent requirements of the world’s three manufacturing groups, these specifications have now been combined into one joint international specification, DHD-1.  

Roadmaster300 15W-40 meets all these specifications including DHD-1.    

Effect on Engines  

Diesel engines are comparatively clean engines and the new regulations are concerned only with oxides of nitrogen (forms smog) and particulate matter (forms soot).  

Current engine designs employ measures such as exhaust gas recirculation and retarded timing of the fuel injection, intended to reduce exhaust emissions.    

Effect on Oil

The engine design changes are estimated to double thermal stress on the oil and greatly increase the quantity of soot introduced into the oil. Engine oils must now possess greatly increased powers of dispersancy to keep the soot in suspension.  

Soot is also formed by combustion of the lubricating oil while oil consumption of modern engines has been drastically reduced. This in turn exposes the oil longer to the hot zones of the engine and less fresh oil is added between oil changes.  


In line with the preferences of American engine manufacturers, the viscosity of CI-4 oils such as Roadmaster 300 is SAE 15W 40.

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