TOC EventsCimbriaPort of South LouisianaTBA GroupTelestackSailors Society
  • The Wolfson Centre for Bulk Solids Handling Technology
  • Cimbria
  • Van Aalst
  • Port of Stockton
  • Vigan
  • Coaltrans Global 2021

Chevron keeps ships sailing amid VLSFO challenges

Chevron keeps ships sailing amid VLSFO challenges

(Posted on 19/01/21)

Chevron Marine Lubricants 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,” said Luc Verbeeke. “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. Incidences of red deposits and scuffing that were relatively frequent in the early days of VLSFO operation have since reduced significantly.

Latest News

Columbia and Seatrans agree strategic shipmanagement tie-up

(Posted on 06/05/21)

Columbia Shipmanagement (CSM) has continued its recent expansion by agreeing a strategic partnership... Read more


OneLearn Global signs up to Neptune Declaration

(Posted on 06/05/21)

Recently launched OneLearn Global, created to provide modern-day training solutions to serve the maritime... Read more


IMO Council membership demonstrates Jamaica’s worth

(Posted on 06/05/21)

Membership of the International Maritime Organisation is important for strengthening Jamaica and the... Read more


CCS grows bulker fleet and scores with Intercargo

(Posted on 04/05/21)

China Classification Society (CCS), the world’s fastest growing classification society, has been... Read more


Su-Nav establishes integrated ship management model

(Posted on 04/05/21)

Su Nav, the integrated ship management company, has established a comprehensive range of services over... Read more


Fednav welcomes its latest icebreaking bulk carrier

(Posted on 29/04/21)

Fednav Limited has announced that it has taken delivery of its latest Polar Class 4 icebreaking bulk... Read more


InterManager vows to source vaccinations for seafarers

(Posted on 29/04/21)

Frustrated by the lack of progress and slow pace of international efforts, InterManager has vowed to... Read more


IOMSR first flag state to partner Eyesea ocean clean up

(Posted on 29/04/21)

The Isle of Man Ship Registry (IOMSR) has become the first flag state to formally back the Eyesea initiative... Read more


IoS-OP fully utilized in new bulk carrier

(Posted on 29/04/21)

IoS-OP*1 has been fully utilized in the bulk carrier built by Shin Kurushima Sanoyas Shipbuilding Co... Read more


MAG’s volumes increase despite Covid challenge

(Posted on 28/04/21)

Despite the challenges of Covid-19, Morska Agencja Gdynia (MAG), in Poland, has performed even better... Read more


Port of StocktonThe Wolfson Centre for Bulk Solids Handling Technology Bühler GmbHCoaltrans Global 2021Van AalstVigan
  • TOC Events
  • Bühler GmbH
  • TBA Group
  • Port of South Louisiana
  • Telestack

Subscribe to our newsletter

Keep up to date with the latest global news in bulk cargo handling and shipping