What is ISO 8178‑5 about? 
ISO 8178‑5 is part 5 of a series of international standards that specifies fuels whose use is recommended for performing the exhaust emission test cycles.
ISO 8178‑5 is applicable to reciprocating internal combustion engines for mobile, transportable and stationary installations excluding engines for vehicles primarily designed for road use.
ISO 8178‑5 is applicable to engines used, e.g., earth-moving machines and generating sets, and for other applications.
Who is ISO 8178‑5 for?
ISO 8178‑5 on reciprocating internal combustion engines is relevant to:
- Companies dealing with exhaust and internal combustion engines
- Manufacturing for internal engines
- Automobile industry
Why should you use ISO 8178‑5?
Reciprocating internal combustion engines is a device which converts chemical energy which is contained in a hydrocarbon into mechanical energy and also converts into the thermal energy of the waste gases that escape into the atmosphere.
ISO 8178‑5 provides various types of fuel properties such as carbon residue, crude oil, diesel fuel, liquefies petroleum gas (LPG), natural gas, methane. In case where it is necessary to run the engine with crude oil, the properties of the fuel, including the elemental analysis, will get measured and reported with the results of the emission measurement.
As a buyer of ISO 8178‑5, the exhaust emission measurement is used in both reference fuels and commercial fuels since fuel properties vary widely from country to country a broad range of different fuels is listed in ISO 8178‑5, which helps for reciprocating internal combustion engines in a standardized way.
What’s changed since the last update?
BS ISO 8178‑5:2021 supersedes BS ISO 8178‑5:2015, which is withdrawn.
BS ISO 8178‑5:2021 includes some technical changes with respect to BS ISO 8178‑5:2015. These are:
- The addition of reference fuels from EU Regulation 2017/654 exhaust emission requirements for internal combustion engines in non-road mobile machinery
- The addition of California Air Resources Board (CARB) E10 emissions certification fuel
- The addition of US Environmental Protection Agency Tier 3 E10 emissions certification fuel
- Updates of fuel specifications from ISO 8217
