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VPS identifies new bunker fuel contamination at Houston

VPS detected presence of Dicyclopentadiene and associated isomers at significantly high levels in VLSFO bunker fuel deliveries in Houston; 11 vessels using this fuel have reported loss of power and propulsion.

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Marine fuels testing company VPS on Monday (10 July) said it has identified via its fuel testing services, a new marine fuel contamination issue in Houston. 

VPS detected the presence of Dicyclopentadiene (DCPD) and associated isomers at significantly high levels in VLSFO bunker fuel deliveries in Houston. These chemical contaminants were detected using in-house GC-MS (Gas Chromatography – Mass Spectrometer) analytical methodologies. VPS has issued a Bunker Alert to its customers referring to these fuel deliveries made by a single supplier during the months of March to May 2023. Problems associated with these bunkers occurred after this fuel was combusted several weeks after bunkering.

Eleven vessels using this fuel have now reported loss of power and subsequent loss of propulsion whilst at sea. These effects resulted from fuel leakage in the ICU (Injection Control Unit) units and fuel pumps not being able to develop the required fuel pressure. Both main and auxiliary engines were affected although failures to auxiliary engines were more commonly reported.

One VPS customer highlighted the issues they encountered when using this Houston VLSFO: the first sign of problems after changing over to this fuel was the failure of the fuel pump and fuel injectors of the auxiliary engines. All the three auxiliary engines subsequently faced the same issues and was unable to produce the required power resulting in a complete blackout and loss of propulsion. The auxiliary engine pumps exhibited significant leakage and the fuel injectors were ceased. Both, fuel pumps and fuel injectors required repeated replacement until no spares remained.

This customer also reported that this fuel had a significant impact on the purification system. It was noted that the purifiers could not remove the high cat fines that were present in the fuel under normal engine operating speed. To keep the purifier operational, main engines required running at low rpm than normal, to reduce the fuel consumption thereby reducing the purifier feed-rate.

Due to restrictions in power, the vessel had restricted manoeuvrability as they could not operate their thrusters. The vessel had to change to LSMGO (Low Sulphur Marine Gas Oil) to arrive safely to the port.

VPS identifies new bunker fuel contamination at Houston

DCPD’s are unsaturated chemical compounds which can polymerise and oxidise under certain conditions. However, the rate of this polymerisation process can be reduced by the presence of inhibitors that are typically found within fuel oil.

Should these compounds start polymerising, the fuel begins to exhibit a level of stickiness and become more viscous, making it difficult for moving components, such as fuel pump plungers and the fuel injector spindles to move freely. These effects cause damage to the fuel injection system. Over a period of time excessive sludge formation is likely to be experienced.

The DCPD compounds that were detected in this fuel ranged from 3,000 to 7,000 ppm (0.3-0.7%).

A number of vessels, had been pre-warned by VPS of the potential high-concentration DCPD contamination of their fuel, via a “Caution” result from the VPS Chemical Screening service, highlighting the value of this pre-burn service provided by VPS.

Photo credit: VPS
Published: 11 July, 2023

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Port & Regulatory

Singapore: MPA issues circular on resolutions adopted by IMO MEPC 84

MPA urges the shipping community to prepare for the implementation of these resolutions, which includes use of multiple engine operational profiles for a marine diesel engine.

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The Maritime and Port Authority of Singapore (MPA) on Tuesday (14 July) issued Shipping Circular No. 7 of 2026 to inform on the resolutions adopted by MEPC 84, which was held from 27 April to 1 May 2026:

This circular informs the shipping community of the resolutions adopted by MEPC 84 and urges the shipping community to prepare for the implementation of these resolutions.

MEPC 84 adopted the following mandatory resolutions:

  • Resolution MEPC.407(84) – Amendments to MARPOL Annex VI (Clarification of entries in data reporting required by Regulations 27 and 28, designation of the North-East Atlantic as an Emission  Control Area for Nitrogen Oxides, Sulphur Oxides and Particulate Matter, accessibility to the IMO Ship Fuel Oil Consumption Database, and review clause of the short-term GHG reduction measure)

This resolution adopts amendments to MARPOL Annex VI, concerning the clarification of entries in data reporting required by regulations 27 and 28, the designation of the North-East Atlantic as an Emission Control Area for Sulphur Oxides, Particulate Matter and Nitrogen Oxides, the accessibility of the IMO Ship Fuel Oil Consumption Database (IMO DCS), and the review clause of the short-term GHG reduction measure. The amendments will enter into force on 1 September 2027 and will be given effect through the Prevention of Pollution of the Sea (Air) Regulations.

  • Resolution MEPC.408(84) – Amendments to MARPOL Annex VI (Use of multiple engine operational profiles for a marine diesel engine, including clarifying engine test cycles)

This resolution adopts amendments to MARPOL Annex VI concerning the use of multiple engine operational profiles for a marine diesel engine, including clarifying the engine test cycles. The amendments will enter into force on 1 September 2027 and will be given effect through the Prevention of Pollution of the Sea (Air) Regulations.

MEPC 84 also adopted the following resolutions:

  • Resolution MEPC.406(84) – Actions to ensure the protection of the marine environment in the Arabian Sea, Sea of Oman and the Gulf Region, particularly in and around the Strait of Hormuz, resulting from the unlawful activities of the Islamic Republic of Iran

This resolution condemns the attacks against commercial and merchant vessels and maritime infrastructure in the Gulf region. The resolution expresses deep concern over the risks these attacks pose to the marine environment, while encouraging member States to strengthen pollution preparedness and response cooperation.

  • Resolution MEPC.409(84) – 2026 Guidelines for Ballast Water Management (BWM) and Development of BWM Plans (G4)

This resolution adopts the 2026 Guidelines for BWM and development of BWM Plans, as part of the BWM Convention review. The Committee resolves to revoke the Guidelines for ballast water management and development of BWM Plans adopted by resolution MEPC.127(53) and amended by resolutions MEPC.306(73) and MEPC.370(80) when the amendments to the BWM Convention approved at MEPC 84 enter into force.

  • Resolution MEPC.410(84) – Amendments to the 2022 Guidelines on the Method of Calculation of the Attained Energy Efficiency Design Index (EEDI) for New Ships

This resolution adopts the amendments to the 2022 Guidelines on the method of calculation of the attained EEDI for new ships, to address dual-fuel engines using two liquid fuels, particularly methanol and ethanol, in the EEDI framework.

  • Resolution MEPC.411(84) – 2026 Guidelines on Survey and Certification of EEDI

This resolution adopts the 2026 Guidelines on survey and certification of the EEDI, to address dual-fuel engines using two liquid fuels, particularly methanol and ethanol, in the EEDI framework.

These Guidelines supersede the 2022 Guidelines on survey and certification of the EEDI (resolution MEPC.365(79), as amended by resolutions MEPC.374(80) and MEPC.403(83)).

  • Resolution MEPC.412(84) – Amendments to the 2022 Guidelines on Operational Carbon Intensity Indicators and the Calculation Methods (CII Guidelines, G1)

This resolution adopts the amendments to the 2022 CII Guidelines, G1, relating to the clarification of CII calculation obligations in the context of enhanced IMO DCS granularity reporting, specifically on “Transport work (W)”.

  • Resolution MEPC.413(84) – Amendments to the 2024 Guidelines for the development of a Ship Energy Efficiency Management Plan (2024 SEEMP Guidelines)

This resolution adopts amendments to the 2024 SEEMP Guidelines, relating to the clarification of CII calculation obligations in the context of enhanced IMO DCS granularity reporting, specifically on the “Distance travelled”.

  • Resolution MEPC.414(84) – 2026 Guidelines for test-bed and onboard measurements of methane (CH4) and/or nitrous oxide (N2O) emissions from marine diesel engines

This resolution adopts the 2026 Guidelines for test-bed and onboard measurements of methane (CH4) and/or nitrous oxide (N2O) emissions from marine diesel engines, and supersede the earlier Guidelines adopted by resolution MEPC.402(83).

  • Resolution MEPC.415(84) – Guidelines for engine load monitoring (ELM) and calculation of emission values

This resolution adopts the Guidelines for ELM and calculation of emission values, to specify the method for ELM to establish factors that reflect the actual operation of a marine diesel engine, and for the calculation of emission values.

  • Resolution MEPC.416(84) – Guidelines for continuous emission monitoring systems (CEMS) used to quantify methane (CH4) and/or nitrous oxide (N2O) emissions from marine diesel engines

This resolution adopts the Guidelines for CEMS used to quantify methane (CH4) and/or nitrous oxide (N2O) emissions from marine diesel engines, which aim to provide a uniform framework for the onboard measurement and mass basis quantification of emissions.

  • Resolution MEPC.417(84) – 2026 Strategy and the Action Plan to Address Marine Plastic Litter from Ships

This resolution adopts the 2026 Strategy and the Action Plan to Address Marine Plastic Litter from Ships.

Any queries relating to this circular should be directed to MPA Shipping Division via email at [email protected].

 

Photo credit: Maritime and Port Authority of Singapore
Published: 14 July, 2026

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Business

Oilmar appoints Shawn Ho to senior bunker trading role in Singapore

Ho has been appointed as the Senior Manager, Business Development and Bunker Trading in Oilmar’s Trading Department.

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Oilmar appoints Shawn Ho to senior bunker trading role in Singapore

UAE-based marine fuel and petroleum products trader Oilmar on Monday (13 July) announced the appointment of Shawn Ho as Senior Manager, Business Development and Bunker Trading in its Trading Department in Singapore.

Ho has more than 15 years of experience in the petroleum industry, including 11 years at Toyota Tsusho Petroleum and four years at Adani Global. His experience covers bunker trading, operations, market analysis and risk management.

“His extensive expertise in commercial trading, strategic negotiations, and developing strong partnerships with suppliers and customers makes him a valuable addition to our team,” the company said in a social media post. 

“As Oilmar continues to expand its global presence and strengthen its position in the marine fuels market, Shawn’s experience, industry insight, and commercial leadership will play an important role in driving our continued growth and delivering value to our customers.”

 

Photo credit: Oilmar
Published: 14 July, 2026

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Business

Seascale Energy hires Soo Yong Koo as Business Development Director in Singapore

In her new role, Koo will focus on supporting customer growth, strengthening commercial partnerships, and helping customers navigate an increasingly complex marine fuels landscape.

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Seascale Energy hires Soo Yong Koo as Business Development Director in Singapore

Seascale Energy, a bunker procurement joint venture of Cargill’s Pure Marine Fuels and Hafnia’s Bunker Alliance, on Friday (10 July) announced the appointment of Soo Yong Koo as the Business Development Director of the company. 

Based at Seascale Energy’s Singapore hub, Koo has more than 25 years of experience in the maritime and energy trading sectors, with expertise in marine fuels, commercial management, business development and customer relations.

She has held senior commercial roles at Trafigura, Mabanaft and BP, with experience spanning physical bunker operations and global sales.

Koo is an active contributor to the marine fuels industry, having served as a Board Member of the International Bunker Industry Association (IBIA), Asia, a member of the Working Group for Marine Fuels under the Singapore Chemical Industry Council (SCIC), and as a member of the Singapore Shipping Association’s (SSA) Marine Fuels Committee.

In her new role, Koo will focus on supporting customer growth, strengthening commercial partnerships, and helping customers navigate an increasingly complex marine fuels landscape. 

The company added that her experience across both conventional and emerging marine fuels aligns closely with Seascale Energy’s ambition to deliver transparent, scalable, and future-ready fuel procurement solutions.

“Soo Yong is highly respected in marine fuels, with 25 years of commercial and operational experience and a strong industry footprint across the IBIA, SCIC and SSA. Her appointment reflects our commitment to strengthening how we serve customers in Asia and beyond as the fuels landscape continues to evolve,” said Peter Grünwaldt and Olivier Josse, Co-CEOs, Seascale Energy.

 

Photo credit: Seascale Energy
Published: 14 July, 2026

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