Predictive Test Development for Navy Diesel Engine Lubricating Oils.
DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER ANNAPOLIS MD SHIP MATERIALS ENGINEERING DEPT
Pagination or Media Count:
The objective of this project was to reduce the time and expense of qualification testing for candidate MIL-L-9000 diesel engine lubricating oils. Work was focused primarily on finding a short term test to correlate with Caterpillar 1G2 engine test deposit ratings. Because the 1G2 engine test deposit ratings have poor repeatability, bench test correlations were attempted using only reference oils, i.e., these oils having a large number of engine results. Three bench tests were evaluated the Alcor 1G Deposition Test, a pressure differential scanning calorimetry method, and a microoxidation method. The Alcor Test gave good predictions of weighed total demerits by Caterpillar 1G2 for the seven reference oils available. The pressure differential scanning calorimetry method also gave a good correlation with 1G2 but only five reference oils were available for evaluation. The microoxidation method shows promise but needs more development. These tests should be evaluated further as additional 1G2 reference oils become available.
- Lubricants and Hydraulic Fluids
- Test Facilities, Equipment and Methods