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The ANAC gas engine oil analysis diagnostics system for industrial piston gas engines

ANAC GAS is an in-depth diagnostics system. Through a simple used oil analysis, the ANAC gives a follow-up of the behavior and depletion of the lubricant and the mechanical wear of industrial gas engines.

ANAC GAS is recommended for:

  • Follow-up of engines operating on natural gas, landfill gas, sewage gas or liquid manure gas.
  • Determination of the optimal oil drain period.


Mechanical wear:

Wear elements Iron, Lead, Copper, Tin, Chromium, Aluminium, Nickel (ppm)

Contamination of the lubricant:

Silicon ( ppm), Water (%), Cooling Liquid (Na and B in ppm).
Optional : chlorine concentration, provided by landfill gas

Characteristics of the lubricant:

Viscosity ( mm2/s ) at 40° C and 100° C, Viscosity Index
Base Number TBN (mg KOH/g) and Acid Number TAN (mg KOH/g)
Initial pH (iPh)
Infrared spectrometry: determination of oxidation (Abs/cm at 1710 cm-1), determination of nitration (Abs/cm at 1630 cm-1)


Additive elements Ca, Zn, P, Mg, Mo, Ba, V, Na, B, K, Ag


The ANAC diagnosis and comments are established with the support of the ANAC database.The results are also individually verified by a ANAC technician, specialized in industrial gas engine lubrication and technology.
The ANAC GAS analysis diagnosis applies the limits indicated by every individual gas engine OEM, for wear metals as well as for oil characteristics.The ANAC GAS expert takes into account the specific knowledge on the operating conditions of industrial gas engines and possible remarks by the user. More than 15 years experience in the follow-up of combustion engines running on every type of gas. Personalized responses on questions by the users are provided


The ANAC diagnosis report is available per email within 24 hours after reception of the sample in the lab. The ANAC report can also be consulted on the Internet. In urgent cases, the ANAC can send the report by fax, as soon as the diagnosis is available.