Wärtsilä Advice Confirms Castrol Concerns on Single Oils

MarineLink.com
Friday, June 21, 2013

Castrol Marine said it has welcomed new guidance from Wärtsilä that undermines claims that mid-range base number (BN) oils represent a single cylinder oil solution for marine two-stroke engines. The advice confirms Castrol’s long-held concerns that using mid-range BN cylinder oils with higher sulphur fuels when slow steaming could lead to cold corrosion.

The engine major has withdrawn approval for mid-range (50-60BN) cylinder oils when used with many marine engines running on Heavy Fuel Oil of above 2.5% sulphur content.

New ‘letters of no objection’ to suppliers limit use of mid-range BN oils on all “Wärtsilä RTA, RT-fl ex and W-X engines as well as Sulzer two-stroke engines” to HFO whose sulphur content is “in the range 0.5<S<2.5 mass %”.

“Our concerns on catch-all, mid-range BNs for slow steaming were first prompted by our own field investigations and then confirmed by bench tests and further field trials,” said Paul Harrold, technology manager, Castrol Marine. “We have consistently argued that mid-range BN oils are not suitable for slow steaming operations on modern engines. The two leading OEMs in the market have now offered specific advice on this issue in line with our position.”

The Wärtsilä letters have been followed by key “single oil solution” proponents acknowledging to customers that cylinder oils previously recommended for HFO with up to 4.5% sulphur content are now for restricted use only.

Castrol Marine was the first cylinder oil supplier to raise concerns on cold corrosion after a number of suppliers presented mid-range BN oils as suitable for slow steaming operations. It has consistently advised customers to use an accurate approach when making lubricant choices, based on engine type and operating conditions rather than simplicity and convenience alone.

In May 2013, Castrol reported case studies for in-service ships to the CIMAC Congress in Shanghai showing evidence of the harmful impacts of cylinder oils of inadequate BN in slow steaming regimes. Data supported the view that higher BN lubricants reduce corrosive wear in slow steaming engines and enable lower, more cost effective feed rates than mid-range BN oils.

Castrol Marine recommends Castrol Cyltech 80 AW in combination with its scavenge drain analysis service to achieve safe slow steaming operations that do not compromise engines or increase lube oil feed rates. The company has also recently responded to customer demand by increasing availability of its 80BN Cyltech 80 AW cylinder oil to 35 ports. Cyltech 80 AW is formulated for crosshead engine types operating on high sulphur residual fuel, typically above 2.5% content.

“MAN Diesel & Turbo has already excluded mid-range cylinder oils from its approved list for newer engines,” said David Goosey, Castrol Marine chief executive and sales director. “Some argued that MAN’s advice was only relevant for a small number of engines. Wärtsilä’s restriction effectively excludes the use of mid-range BN oils for about two thirds of the fuel used in the relevant engines outside ECAs.”
 


Fuels & Lubes

MN100: Klüber Lubrication NA LP

The Company: Klüber Lubrication is one of the world’s leading manufacturers of specialty lubricants, offering high-end tribological solutions to virtually all industries and markets worldwide.

MN100: FloScan Instruments, Inc.

The Company: FloScan designs and manufactures Fuel Monitoring Systems for use on a wide range of diesel powered commercial vessels on every continent including ocean-going,

Tanker Market: ‘New Normal’ Drives Downbeat Summer Sentiment

The tanker market is forecast to see challenging conditions with technical and structural factors impacting earnings, according to independent research and consultancy

Marine Power

Pods Versus Water Lubricated Props

Thordon Bearings has called on the marine industry to investigate the characteristics of both conventional seawater-lubricated propeller shaft systems and podded

SCHOTTEL’s LEACON Certified Leak-free

Following a technical update, the SCHOTTEL LEACON system has now been certified by classification society DNV-GL as a leak-free sealing system for the oil-to-sea interface.

IWSA to Host Wind Propulsion Forum at SMM

The International Windship Association (IWSA) will host its annual Wind Propulsion Innovation Forum at SMM2016 in Hamburg, including an extensive agenda with expert

 
 
Navigation Offshore Oil Pipelines Pod Propulsion Port Authority Ship Electronics Ship Repair Ship Simulators Sonar Winch
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.0535 sec (19 req/sec)