Lloyd’s Register’s latest FOBAS Fuel Insights report finds that despite growing fuel diversity and tighter environmental regulations, global marine fuel quality remained resilient in the first half of 2025. Improved testing, data sharing, and operational practices are helping shipowners adapt to cleaner blends and stricter sulfur limits.

FOBAS testing shows the vast majority of fuels meet specifications, with only 3.5% of very low sulfur fuel oil (VLSFO) samples deemed off-spec, and just 0.6% exceeding MARPOL Annex VI’s 0.50% sulfur limit. Stability results varied by port, while distillates continued to deliver predictable performance, making them the preferred choice for operations requiring higher quality assurance.

Sustainability and fuel diversity emerged as key trends. Ports such as Singapore, Algeciras, and Antwerp are seeing greater uptake of FAME-based biofuel blends, particularly B30 RF, supported by clearer guidance from MEPC 83 and ISO 8217:2024. No systemic operational issues have been reported.

The report also highlights the growing adoption of ASTM D240 bomb calorimetry for more accurate heat value measurement, enabling better fuel consumption forecasts, voyage planning, and cost control.