# Commission Regulation (EU) No 582/2011 of 25 May 2011 implementing and amending Regulation (EC) No 595/2009 of the European Parliament and of the Council with respect to emissions from heavy duty vehicles (Euro VI) and amending Annexes I and III to Directive 2007/46/EC of the European Parliament and of the Council (Text with EEA relevance), Division 2.2.3

Extent: E+W+S+N.I.

For positive ignition engines and dual-fuel engines fuelled with NG/biomethane:
2.2.3.1. In the case of an engine with self-adaptive fuelling, paragraph 5.2.3.3.1 of UNECE Regulation No 85 shall be understood as follows:
‘ The fuel used shall be the one available on the market. In case of dispute the fuel shall be the appropriate reference fuel specified in Annex IX to this Regulation. Instead of the reference fuels specified in Annex IX to this regulation, the reference fuels specified in Annex 8 to UNECE Regulation No85 may be used. ’
2.2.3.2. In the case of an engine without self-adaptive fuelling, paragraph 5.2.3.3.2 of UNECE Regulation No 85 shall be understood as follows:
‘ The fuel used shall be the one available on the market with a Wobbe index at least 52,6 MJm -3 (20°C, 101,3 kPa). In case of dispute, the fuel used shall be the reference fuel G R specified in Annex IX to this Regulation. ’
2.2.3.3. In the case of an engine labelled for a specific range of fuels, paragraph 5.2.3.3.3 of UNECE Regulation No 85 shall be understood as follows:
‘ The fuel used shall be the one available on the market with a Wobbe index at least 52,6 MJm -3 (20°C, 101,3 kPa) if the engine is labelled for the H-range of gases, or at least 47,2 MJm -3 (20°C, 101,3 kPa) if the engine is labelled for the L-range of gases. In case of dispute, the fuel used shall be the reference fuel G R specified in Annex IX to this Regulation if the engine is labelled for the H-range of gases, or the reference fuel G 23 if the engine is labelled for the L-range of gases, that is the fuel with the highest Wobbe index for the relevant range, or ’

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Source: https://www.legislation.gov.uk/eur/2011/582/annex/XIV/division/2/division/2.2/division/2.2.3 (the official version)
Page: https://openlegislation.uk/eu-regulation-2011-582/annex-XIV/division-2/division-2.2/division-2.2.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.