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Chevron lubricant offers solution to abnormal liner wear caused by VLSFO

Some ships reported build-up of red deposits on piston crowns and top edges, since the switch to VLSFO particularly on older two-stroke marine engines, it said.
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Chevron lubricant

Chevron Marine Lubricants on Monday (18 January) said it has helped ship owner customers identify and manage a distinctive engine condition challenge associated with the widespread switch to low-sulphur fuels.

Some ship owners using very low-sulphur fuel oil (VLSFO) have reported build-up of red deposits on
piston crowns and top edges, sometimes combined with red iron burrs in scavenge ports.

The deposits are associated with abnormal liner wear (or scuffing) since the fuel switch, particularly on older two-stroke marine engines.

Chevron used a four-step laboratory analysis to narrow down likely causes. The deposits were found to
include a compound of materials including harmless detergent additive residue and iron oxide.

The detergent residue was determined not to be a source of wear as the deposits were only found in single cylinders rather than across the engine.

The fuels associated with the red deposit and scuffing incidences were also analysed. Chevron found that the VLSFO blends involved showed differences from others in two fuel characteristics, typically a lower calculated carbon aromaticity index (CCAI) and high estimated cetane number (ECN).

Although VLSFO has been found to offer a typically higher energy value content than heavy fuel oil (HFO), and therefore can offer value for money, its combustion engine density properties can result in harsher operating conditions and more stress on the engine components.

“While most users transitioned smoothly, these properties can cause trouble for older engines”, said Luc Verbeeke, Senior Engineer, Chevron Marine Lubricants.

“While newer ships do not have a problem using these fuels, engines already closer to an overhaul did
struggle sometimes.

“Cylinder units that could have run for another six months or a year on HFO did not survive the tougher conditions with the new fuels.”

An engine maintenance programme recommended by Chevron Marine Lubricants – supported by routine testing with Chevron’s DOT.FAST onboard testing kit – helped to provide protection against liner wear and damage.

Photo credit: Chevron
Published: 19 January, 2021

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Alternative Fuels

Singapore-based Golden Island, Qingdao Port team up on alternative bunker fuels

Agreement covers green methanol, green ammonia and bio-LNG, with cooperation spanning fuel production and transportation through to storage, sales and bunkering.
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September 22, 2026

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Golden Island, Qingdao Port team up on green methanol, ammonia and bio-LNG

Singapore bunker supplier Golden Island Pte Ltd on Monday (21 September) said it has signed a strategic framework agreement with Qingdao Port International Co Ltd to collaborate on the supply of alternative marine fuels.

The agreement covers green methanol, green ammonia and bio-LNG, with cooperation spanning fuel production and transportation through to storage, sales and bunkering.

“By combining our MPA-licensed bunkering capabilities with Qingdao Port’s incredible logistics and strategic hub position, we are building something truly robust for the global shipping industry’s low-carbon future,” the company said in a statement. 

Qingdao Port International, which operates five major port areas in China, will bring its logistics network, storage facilities and customs clearance capabilities to the partnership.

Golden Island is licensed by the Maritime and Port Authority of Singapore (MPA) to conduct methanol bunkering and is ISCC EU-certified.

The companies are also engaging with container liners, bulk carriers, oil tankers and cruise ships regarding the adoption of alternative marine fuels.

 

Photo credit: Golden Island Pte Ltd
Published: 22 September, 2026

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Ammonia

HD HHI and HD KSOE secure ABS AiP for ammonia bunkering vessel design

ABS awarded approval in principle for the basic design of a 22,000 CBM bunkering vessel capable of supplying ammonia as marine fuel.
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September 22, 2026

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HD HHI and HD KSOE secure ABS AiP for ammonia bunkering vessel

Classification society ABS on Monday (21 September) said it has awarded HD Hyundai Heavy Industries (HD HHI) and HD Korea Shipbuilding & Offshore Engineering (HD KSOE) approval in principle (AIP) for the basic design of a 22,000 CBM bunkering vessel capable of supplying ammonia as marine fuel.

The approval is the result of a joint development project initiated earlier this year. ABS reviewed the design’s general arrangement, machinery arrangement, ammonia cargo handling system and fuel supply system against applicable class and international requirements.

Gareth Burton, ABS Senior Vice President, Global Engineering, said: “Bunkering infrastructure is a critical step for any marine fuel to scale, and it has to be implemented with safety designed in from the start.

“This AIP reflects the industry’s need for fuel flexibility while advancing the safe bunkering of ammonia. ABS is proud to support HD HHI and HD KSOE as they develop technologies that expand fuel flexibility.”

Ryu Hong-Ryeul, Chief Technical Officer (CTO) of HD HHI, said: “As ammonia rapidly emerges as a viable low-carbon alternative fuel, demand for ammonia bunkering vessels is expected to grow in line with the increasing adoption of ammonia-fuelled ships. 

“This AIP marks a significant milestone toward the commercialisation of ammonia bunkering vessels.”

ABS and the HD Hyundai group have worked together across a range of technologies supporting ammonia as a marine fuel. Recent projects have included AIP for HD KSOE’s ammonia cargo handling and bunkering system and initial review for HD HHI’s machinery arrangement in engine room.

 

Photo credit: ABS
Published: 22 September, 2026

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Alternative Fuels

J-ENG completes land-based testing of hydrogen-fuelled marine engine

Engine will be installed on a 17,500 DWT multipurpose vessel to be built by Onomichi Dockyard for MOL and MOL Drybulk, with onboard demonstration testing scheduled to begin in April 2028.

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September 22, 2026

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Japan Engine Corporation (J-ENG) on Friday (18 September) said it has completed land-based testing of the world’s first hydrogen-fuelled engine for large commercial vessels, the 6UEC35LSGH.

During factory testing, the engine achieved a hydrogen co-firing rate of at least 95%, reducing GHG emissions by more than 95% compared with conventional heavy-fuel-oil engines.

By adopting a high-pressure direct injection system, which injects fuel directly into the cylinder at high pressure, J-ENG said the engine achieves stable hydrogen combustion. 

Safety measures were also implemented, including a robust structure to prevent hydrogen leakage and double-walled piping for hydrogen supply lines. 

“Approval testing was conducted in the presence of ClassNK and was completed successfully,” the company said. 

The engine will be installed on a 17,500 DWT multipurpose vessel to be built by Onomichi Dockyard for Mitsui O.S.K. Lines and MOL Drybulk.

Hydrogen fuel will be supplied to the engine through a marine hydrogen fuel system, consisting of marine hydrogen fuel tanks and a fuel supply system, developed and manufactured by Kawasaki Heavy Industries.

In addition, Nippon Kaiji Kyokai (ClassNK) will conduct safety assessments throughout each stage of the engine’s development and the vessel’s design, construction and operation.

The vessel will then undergo sea trials before onboard demonstration testing begins in April 2028. 

Kawasaki will also develop and manufacture bunkering equipment for supplying liquefied hydrogen to vessels. 

“The demonstration will further evaluate the engine’s durability and performance under actual operating conditions,” J-ENG added.

 

Photo credit: J-ENG
Published: 22 September, 2026

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