5.3.1 Fuel characteristics may influence the engine
exhaust gas emission. Therefore, the characteristics of the fuel used
for the test shall be determined and recorded. Where reference fuels
are used, the reference code or specifications and the analysis of
the fuel shall be provided.
5.3.2 The selection of the fuel for the test depends
on the purpose of the test. Unless otherwise agreed by the Administration
and when a suitable reference fuel is not available, a DM-grade marine
fuel specified in ISO 8217, 1996, with properties suitable for the
engine type, shall be used.
5.3.3 The fuel temperature shall be in accordance
with the manufacturer's recommendations. The fuel temperature shall
be measured at the inlet to the fuel injection pump or as specified
by the manufacturer, and the temperature and location of measurement
recorded.