A program is proposed to design fabricate, test, and deliver 10 prototype, on-line, prognostic and diagnostic monitors to the U.S. Army. The on-board, microprocessor-based monitors will be able to detect incipinet engine diagnosis of the detected faults. The monitors will additionally be able to monitor lubricating oil quality (including detection of ferric wear debris) as well as measure real-time generator set efficiency. The Phase I effort went well beyond the necessary demonstration of "proof-of-principle" via successful daily use of a working prototype in the severe 'real-world" service environment of a working autonomotive diesel engine.