From:	Jeff Clark
Sent:	Wednesday, May 11, 2005 3:31 PM
To:	Andrew Ritchie (E-mail); Andy Broff (E-mail); Bill Larch (E-mail); Bob Campbell (E-mail); Brad Carter (E-mail); Cathy Devlin (E-mail); Greg Shank (E-mail); Jeff Clark (E-mail); Jim Gutzwiller (E-mail); Jim Matasic (E-mail); Jim Moritz (E-mail); Jim Rutherford (E-mail); Jim Wells (E-mail); John Haegelin (E-mail); Jose Gutierrez (E-mail); Keith Selby (E-mail); Ken Goshorn (E-mail); Mark Cooper (E-mail); Michael Minotti (E-mail); Pat Fetterman (E-mail); Riccardo Conti (E-mail); Ron Buck (E-mail); Scott Richards (E-mail); Steve Kennedy (E-mail); Tom Franklin (E-mail); Wim Van Dam (E-mail)
Subject:	T-12 and Mack SP Minutes of May 11 2005
Attendance - Wim van Dam, Jeff Clark, Bob Campbell, Jim Rutherford, Jim Moritz, Jim Gutzwiller, Tom Franklin, John Haegelin, Jim Matasic, Jess Hamilton, Riccardo Conti, Greg Shank, Ken Goshorn, Scott Richards, Andy Broff, Mark Cooper, Ron Buck, Daryl Baumgartner

Minutes - of April 26 were approved.

T-12 Reference Period - A previous proposal had been circulated by Jim Moritz, proposing an 18 month calibration period. Riccardo indicated that XOM was not comfortable with 18 months, but were more comfortable with 9 to 12 months. Tom Franklin stated that he felt this is primarily an economic issue of amoritizing reference costs over candidate tests. Greg replied that understanding the performance of the test is also important and that there have been times that test performance has changed and low reference activity has not caught the change. Greg does not find 18 months acceptable. Greg is willing to propose 9 months. Wim van Dam stated that Oronite is also uneasy with 18 months; they have repeatedly seen issues with tests that long intervals between references do not catch; going 18 months would be going in the wrong direction as far as highlighting test issues. At this point a very long and contentious discussion took place. Greg moved, Scott seconded that the reference period be 10 months or 10 tests. Motion passed 6-3-1. Greg stated that he would commit to reviewing the reference period after completion of the second round of referencing.

T-12 Matrix Data - there was a brief discussion about how the matrix data and oil codes would be revealed. We will investigate the proper way to go and will go from there.

T-11 Oil Consumption - recent concern has arisen regarding high oil consumption levels. The reference data reflects an industry increase in oc. SwRI has seen higher oc since last fall. They successfully referenced but lost oc control after just a few tests. This pattern has continued. Lubrizol has seen levels elevated on both references and candidates as well. Afton's levels has moved from the 40s to the 60s. XOM has seen problems also, cutting short the previous cal period and showing problems on references. PE has seen problems back to last spring, they are currently running a reference that is in the high 40s. Much discussion ensued regarding possible causes such as fuel, head build, head components, parts batches, etc. No obvious smoking gun was found. Concern eventually focused in on the second ring and the valve guides. Wim ask Ron Buck to add some parts dimensional data to the oil consumption data to see if a correlation could be found. Lubrizol (T-12 kit) and XOM (T-11 kit with old valve guides) will also be running tests mixing some hardware batches to see if anything changes. Labs are to find out what valve guides were run with what tests and see if corresponds to the oc shift. There is a tentatively planned teleconference for May 25 at 1:00 pm Eastern to discuss any findings.

Valve Lash Check at Break-In - for T-10 and T-11 to be left at lab discretion.

Next T-12 Call - the week of May 30.

Regards,

Jeff Clark
Staff Engineer
ASTM Test Monitoring Center
6555 Penn Avenue
Pittsburgh, PA 15206
412-365-1032
412-848-8843 (cell)
jac@astmtmc.cmu.edu