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July 02, 2014

Delays on PC-11 and GF-6

Straining under the workload of developing two new engine oil categories – PC-11 for heavy-duty diesel oils and GF-6 for gasoline-fueled passenger cars – oil, additive and testing companies want to see the deadlines eased.

At their June 12 meeting, the developers of the new heavy-duty category reviewed the status of the engine sequence tests that are needed for PC-11. The American Petroleum Institute's New Category Development Team, which is chaired by Dan Arcy of Shell, had earlier decided that most of the current tests and limits for today's API CJ-4 engine oils would be applicable to the new category.

To gauge industry acceptance of that decision, the team asked ASTM's Heavy Duty Engine Oil Classification Panel to run an exit ballot (or rather two ballots, since PC-11 is envisioned as a split category, PC-11A and PC-11B). The ballots identified the Caterpillar C-13 and Caterpillar 1N tests, the GM roller follower wear test, the Cummins ISB and ISM wear tests and the Mack T-11 as needed for PC-11A & B. All would be carried forward with their API CJ-4 limits.

As well, three new engine tests have been proposed: the Mack T-13 for oxidation and corrosion, Cat C13 aeration test and Daimler DD13 scuffing wear test. But critical decisions regarding how to conduct each new test's matrix have yet to be made.

For a test to be ready to move along to matrix testing, the requirement is for the test to be run two to four times at each participating matrix lab, with results matching those seen at development laboratories for precision and discrimination. In addition, the initial test method needs to be essentially complete, even if it's not quite the full ASTM version. Lastly, each participating test laboratory needs to be visited to confirm compliance with test-stand setup.

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