Hercules HD 20W-50

Heavy Duty Mineral Diesel Engine Oil (HDDEO)

BULWARK HERCULES HD oils are high performance, heavy duty multi-grade diesel engine oils of the latest generation. They are specifically designed to lubricate a wide range of diesel engines equipped with EGR, SCR & NOx reduction systems requiring API CI-4 or ACEA E7 performance requirements and more challenging OEM specifications.

BULWARK HERCULES HD 20W-50 oil is manufactured using premium hydrocracked mineral base stocks and high-performance additives to provide reliable and superior all year-round performance. Recommended for use in naturally aspirated and turbo-charged high speed 4-stroke diesel engines without diesel particulate filters (DPF) deployed in commercial road transport and off highway application

Performance Level

  • API CI-4, CH-4/SL 
  • ACEA E7-12 
  • MB 228.3
  • MAN M3275-1
  • MTU TYPE 2
  • CUMMINS CES 20077/78

Key benefits

  • High performance hydrocracked base oil and balanced metallic detergent/dispersant additive reduces maintenance costs and maintain excellent engine cleanliness in all service conditions. 


  • Improved BN reserves and acid neutralizing additives supports use of diesel with varying sulphur content and provides optimum engine protection.


  • Preserves the oil performance and stays in grade till the end of service life as a result of excellent and optimized combination of additive & shear stable VI Improver.