Servo NGE40 is a high quality natural gas engine oil.It provides reliable protection for trucks and buses using Compressed Natural Gas (CNG) or Liquefied Natural Gas (LNG). It is synthesized from high quality base stocks and a balanced additive system. This advanced medium ash formulation provides excellent oxidation, nitration, and thermal stability to minimize combustion chamber ash deposits.It lubricates with less varnish, sludge, and carbon build-up under the most severe operating conditions.It is manufactured by IOCL on demand basis.We have this product in stock.