Hercules CNG LA 10W-40

Gas Engine Oil - Low Ash (CNG)

BULWARK HERCULES CNG LA oils are extreme low ash gas engine lubricants designed for medium and heavy-duty commercial vehicles running on CNG and other natural gas as fuel. Specially made from superior low Sulphur base stocks and advanced additive package for gas engines, these oils resist wear under extreme operating conditions. Their high viscosity index (HVI) provides additional protection against start-stop mode and high temperature operating conditions.


BULWARK HERCULES CNG LA 10W-40 is suitable for use on gas fueled engines (CNG, LPG and other natural gas), which include passenger cars and light, medium & Heavy commercial vehicles which requires API CI-4 performance level.

Performance Level

  • API CI-4

  • MB 228.51, MB 226.9

  • MAN M3477, M3271-1

  • MTU Type 3.1, DEUTZ DQC-III-10 LA,

  • CUMMINS CES 20076/77, MACK EO-N

Key benefits

  • Single oil for fleet owners with CNG, dual fuel and gasoline vehicles.


  • Special Low ash additives and dispersants extend oil performance/service life.


  • Good nitration resistance protects from CNG related valve deposits.


  • Excellent thermal and oxidation stability.