What's Happening?
VPS has reported an increase in shale oil components within marine fuels bunkered in Singapore, specifically in Very Low Sulfur Fuel Oil (VLSFO). Over February and March 2026, VPS testing identified 90,000 metric tons of VLSFO containing compounds derived
from Estonian Shale Oil. These components, including resorcinol and alkyl benzenediols, can destabilize fuel, leading to sludge formation and filter blockages. Although no operational issues have been reported yet, the presence of these compounds raises concerns about fuel stability and potential long-term effects. The acid numbers in these fuels, ranging from 1.98 to 2.34 KOH/g, approach the ISO8217 specification limit, indicating potential risks.
Why It's Important?
The detection of shale oil components in marine fuels is significant due to the potential operational challenges it poses to the shipping industry. The stability of marine fuels is crucial for the safe and efficient operation of vessels. The presence of unconventional compounds like resorcinol and alkyl benzenediols can lead to delayed operational issues, such as sludge formation and equipment fouling. This situation underscores the need for stringent fuel quality monitoring and highlights the complexities of fuel blending practices. The shipping industry must remain vigilant to avoid disruptions and maintain compliance with international fuel standards.
What's Next?
VPS recommends precautionary measures for handling these fuels, suggesting that shipping companies closely monitor fuel stability and composition. The industry may need to reassess blending practices and consider alternative fuel sources to mitigate risks. Stakeholders, including fuel suppliers and regulatory bodies, might engage in discussions to address these challenges and ensure compliance with ISO8217 standards. Continued monitoring and testing will be essential to prevent potential operational disruptions and maintain the integrity of marine fuel supplies.
