Emerald RT79 HD 15W40 is a multigrade, diesel motor oil of the latest generation, perfect for use in the latest heavy-duty 4-stroke diesel engines. Meets the latest standard issued by truck manufacturers. Premium, solvent-refined base oils combined with unique Low SAPS additives provide the product with the following properties:


  • Meets or exceeds the latest emission requirements
  • Very powerful detergency: minimal deposits in the hot zone of the engine
  • Very strong dispersion: deposits and sludge formation are severely restricted
  • Very high resistance to corrosion and foaming
  • A high and stable viscosity index
  • A low sulfate ash content
  • Powerful wear resistance: resulting in reduced wear of piston rings and cylinder wall