| 1. |
A single-cylinder unit, designated NATI-69, has been developed for the classification rating of Group D oils with respect to detergency, and also for research on the behavior of oils under conditions simulating those in current and future high-performance tractor diesels.
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| 2. |
A set of conditions has been selected and a procedure developed for rapid 60-h tests that can provide a reliable differentiation of Groups G and D motor oils with respect to detergency.
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| 3. |
The results of tests on various Soviet and foreign Group D oils in the NATI-69 unit are in agreement with the results from long-term test-stand evaluations (960 h) and service tests (2000 h) in the high-performance supercharged tractor diesels SMD-62, A-41T, and YaMZ-238NB.
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 4, pp. 50–53, April, 1976.