I have been following the thread on oils, and have an observation. The
specifications are changing rapidly. Chevron Delo 400 (for diesel engines)
was frequently mentioned on the List as a good one. I bought a case of 6 one
gallon jugs of this (have 4 3000s). This oil was shown to have lots of the
good stuff in the extensive report by LN Engineering dated 5/17/07. The report
shows this oil to have the API rating of CI-4, tested 06/06. The oil I bought
has the API rating of CJ-4/SM which has much less of the good stuff based on
the chart on page 6 of the report.
Please understand that I have no complaint towards the posting of this report.
My point is that b/4 buying anything, study the report and look at the API
rating of what you think you want to buy. It looks to me that the good
ratings are oils w/ SE, SJ, and CI-4. Look at the changes of Shell Rotella
between the 2005 tests and the 2007 tests.
I just bought 3 pints of GM EOS which has lots of the good stuff, per page 6
of the report. Got it at the local Chevy dealer, $10/pint. Put one in an
engine that we started for the first time today (friend's car) and will put
one in the 1959 BN7 engine that I'm rebuilding now. Also, I talked to Delta
Cam in Tacoma, WA a couple of days ago, and they said that once the
cam/lifters are properly broken in (2000 rpm for 20 minutes w/ the proper
pre-lube), wear is not a serious problem.
I don't claim to know much about oil, just trying to summarize some