CWA 15145:2004

This CEN Workshop Agreement specifies requirements and test methods for marketed and delivered
emulsion fuel. It is applicable to emulsion fuel for use in internal combustion engine vehicles designed to run
on diesel as specified in EN 590.
NOTE 1 Deliverance to public fuelling stations is currently not envisaged.
Emulsion fuel is a mixture of 5 % (m/m) to 15 % (m/m) water, diesel and additives to allow use in internal
combustion engines, including the possibility of having different 'seasonal grades' for national and local
requirements.
NOTE 2 For the purposes of this CEN Workshop Agreement, the terms “% (m/m)” and “% (V/V)” are used to
represent respectively the mass fraction and the volume fraction.
Two grades of emulsion fuel are introduced, that differentiate for the amount of water and other related
parameters (density, viscosity, stability). The higher water content emulsions (Grade A) provide the best
environmental benefits, while the lower water content emulsions (Grade B) will provide less power loss, thus
enabling applications where power loss is a critical issue.
NOTE 3 Public availability at retail sites of emulsion fuels, other than with specific local exemption rules, may not be
allowed according to national legislation implementing European Community Directives for diesel fuels [1].