FAME / Biofuel
Fatty Acid Methyl Ester biofuel blended into marine fuels; ISO 8217:2017 permits up to 7% (B7).
In practice
FAME content in the BDN noted; engine OEM may impose handling restrictions (lubricity, water content). Operator's combustion test verifies in-spec delivery.
Regulatory detail & full definition
Fatty Acid Methyl Ester biofuel produced by transesterification of vegetable oils or animal fats, blended into marine distillates and increasingly into residual fuels. ISO 8217:2017 permits up to 7% FAME (B7) in distillates, with the 2024 update accommodating higher blends. CIMAC Recommendation 02/2018 covers operational considerations: FAME is hygroscopic, has lower oxidation stability than mineral fuel, and supports microbial growth — making tank cleanliness and low-temperature handling discipline essential. FAME contributes to a vessel's CII rating because lifecycle CO2 is lower than fossil-derived fuel.
Authoritative source: ISO 8217 ↗
Related
Source: ISO 8217:2017; CIMAC Recommendation 02/2018
High confidence
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