Management Board
Unconfirmed Minutes from the last Management Board meeting, held on 1st April 2008, are now available to CEC Working Group members on the CEC Web Site.
SG-L-093 DV4
ATIEL members advised the CEC Board that they have now obtained data
that convinces them that the piston cleanliness parameter should now be
included in the test method.
It was agreed by the CEC Board, that the piston cleanliness parameter in CEC L-93-04 has now been approved, effective 1st April 2008. The Test Method will be updated.
SG-F-098 DW10 Injector Fouling
This sponsored test development has been completed.
The Test Method CEC F-98-08 was officially accepted by the CEC Board on 10th March 2008 and the Group moved to Surveillance mode at that time. The Test Method became available from 2nd April 2008. Companies are now able to purchase a licence from CEC to use this test, at a cost of Euro 19,800. This entitles the company to access the Test Method on the CEC Web Site, participate in Round Robins / Test Monitoring (providing appropriate quality controls are in place) and to attend SG-F-098 meetings. Please contact the CEC Secretariat if you are interested in the Test Method.
TDG-L-099 OM646 Wear Test
Update on the progress of this test development.
Round Robin analysis and a Precision Statement are expected to be presented to the Board at their next meeting, so that they can accept the test into CEC. The Test Method should also be made ready for publication immediately it is accepted as a CEC test and then the Group will move to Surveillance mode.
TDG-L-100 Turbo Deposits Test
No further announcements about this test development are currently available.
SG-L-101 OM501 Bore Polishing and Piston Cleanliness Test
The spread of results for piston cleanliness are causing some concern.
The Group is investigating the cause to establish if this is a Rating issue or something to do with engine operating conditions. Those labs that ran repeat tests on the good reference oil should compare the detailed test conditions to try to identify possible means of improving the repeatability. It is possible that methodology needs to be tightened or some results declared invalid. Revised or corrected data and a precision statement is requested for the next Board meeting.
Test Monitoring
Update on progress.
The new test monitoring system is being tested extensively by SDG and some Group members, to ensure it is robust and producing the correct data. The system should be rolled out to all the Groups previously on the system in the next few weeks.
SG-L-036 The Measurement of Lubricants Dynamic Viscosity under Conditions High Shear (Ravenfield Viscometer)
The Group is proposing that the test be revised to accept the use of Tannas as well as Ravenfield equipment, following analysis of the results of a recent Round Robin.
The equivalent ASTM method already accepts both pieces of equipment. It was agreed to ask the Groups SDG Liaison Officer to provide a report on the Round Robin and to confirm the equivalence of the two pieces of equipment. This can then be reviewed at the next Board Meeting. The revised Test Method should also be made ready for publication upon confirmation of acceptance of this change by the CEC Board.
SG-L-078 Direct Injection Diesel Engine Ring Sticking & Piston Cleanliness Test (VW TDi)
Concerns are being expressed about the repeatability of fresh and used oil TBN measurements.
It was agreed to ask the Group to investigate, promptly, why there is such a wide variation in results for fresh and used oil, to advise what method(s) are being used to determine Total Base Number (TBN) and to advise how they plan to improve measurements for the future.
It is understood that ACEA may wish to include TBN depletion as a further performance criteria in the test, with it being measured before and after the test to determine depletion within certain limits. The CEC Board are requesting the Group to consider whether used oil TBN and TBN depletion would be useful and meaningful performance parameters in this test.
Biofuels
The Reference Fuels Group is working on updating and upgrading the Reference Fuels Manual with additional information and are planning to change the specifications into a different format.
Biofuels must be supplied to a high standard and sourced from a list of approved companies. There is concern that the current standard is not enough. New plants are coming on-stream but there is not a lot of experience in the market. There are still questions about the stability of biofuels. Stability is a critical factor for biofuels used as reference fuels for CEC tests.
It is important that suppliers of reference fuels follow rigid procedures in relation to the handling and quality control during storage of biofuels, as well as using the preferred test methods to establish the specification. CONCAWE undertook to supply guidelines in writing for the Reference Fuels Group, which can also be added to the Reference Fuels Manual.
TDG-T-091 Evaluation of Controlled Slip Torque Convertor Clutches (ZF-GK Test Rig) &
TDG-T-102 Evaluation of Wet Start & Shift Clutches (ZF-GK Test Rig)
The Management Board agreed that these two new tests will be accepted into CEC.
The Groups will move to Surveillance mode upon publication of the final approved test methods on the CEC Web Site. The Test Methods must each include a referencing protocol and a Precision Statement, based on statistical evidence and will have the designation CEC L-91-08 and CEC L-102-08 respectively. They will be published on the CEC Web Site and will be available for purchase at Euro 1,000 each, once the formats are approved. The Board has requested sight of the detailed statistical analysis with the Precision Statements and a referencing protocol for each test - that should be drawn up by the SDG Liaison Officer - before the methods are published.
Rating Workshops
Rating Workshops have re-started. They are organised by ISP in Germany. All Rating Workshops are publicized on the main page of the CEC Web Site.
CEC Help Desk
Help is available from Lyn, Barry and Monique. See the CEC Web Site for details: www.cectests.org
Marine and Large Engine Groups
TDG-L-096 Performance Characterisation of Cylinder Lubricants
This Group has closed due to lack of progress.
TDG-L-097 Line Lacquer Formation Tendency & Factors influencing High Oil Consumption
This Group has closed after providing a report on its findings.
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