"Before I turned the key, I telephoned my local Cummins distributor to have him check his stock of Cummins Valvoline Premium Blue, 15W40. He confirmed what I found on a gallon jug purchased last Friday at Auto Zone. Very discreetly, "CJ" markings preceeded the CI at the top of the API donut. Oddly, the CI-4 plus mark was prevalently displayed at the donut. The part number (VV70509) for the jug did not change. Is this the same lube oil that did so well in the Issue 56 and 57 tests?We will find out as a sample was sent to the lab on July 11, 2007.
From the front page of the website a few weeks back.