ISO 8217:2024

ISO 8217 specifies the requirements for petroleum-derived and bio-residual marine fuels delivered for use in marine diesel engines and boilers, defining distillate (DM) and residual (RM) grades by limits on viscosity, density, sulphur, flash point, water, ash, vanadium, sodium, and aluminium plus silicon, among others. The 2024 edition (the seventh) extends the structure to fuels containing biofuel components, adding FAME-containing distillate and residual grades and parameters relevant to fatty-acid methyl esters. It is the contractual quality reference cited in bunker supply agreements and recorded on the bunker delivery note.