defects

Hidden Bunker Defects That Pass ISO 8217 Testing Still Disrupt Ship Operations

Lloyd's Register FOBAS reports that ship operators are increasingly facing bunker defects that pass ISO 8217 testing but cause operational issues. In March and April 2026, fuels with elevated Estonian shale oil led to filter, separator, and pump problems. Off-spec cases remain high, with sulphur, water, sediment, and stability issues persisting.