Extreme-Temperature Multi-Use Engine Oils

Period of Performance: 07/11/2002 - 07/11/2004


Phase 2 SBIR

Recipient Firm

Surfaces Research & Applications, Inc.
8330 Melrose Drive
Lenexa, KS 66214
Principal Investigator


Surfaces Research is developing multigrade (15W40) extreme-temperature engine oils that provide superior performance and single-fluid logistic advantages for the U.S.Army Future Combat System (FCS) engine. The FCS engine operates at significantly higher temperatures for longer times than previous low-heat-rejection (LHR) engines. The Surfaces Research lubricant will be the engine oil, cooling fluid, and transmission fluid in the FCS propulsion system. In Phase I, we made breakthrough developments of high-stability multigrade oils. We formulated them with our proprietary innovative additive packages. We demonstrated major enhancements in lubricant performance. In laboratory tests predicting LHR engine performance, the new multigrade oils had four times greater life at 450°F than the best LHR engine-tested oil, Surfaces Research single-weight SRL-40. The new 15W40 lubricants had better wear/friction than all commercial and experimental engine lubricants. Phase II objectives are to finalize lubricant formulations and conduct tests in U.S.Army FCS demonstrator engines: a Detroit-Diesel-Series-50 350HP four-cylinder, four-stroke engine; and a high-temperature, 750HP opposed-piston two-cycle engine. We will adjust lubricant formulations, based on engine test data, and optimize properties for cooling fluid and transmission fluid. This program will enable us to meet the important goal of a single multigrade propulsion system fluid for future Army and commercial uses.