Advanced Engine Technologies, Inc. (OTC Bulletin Board: AENG - news) is continuing its efforts to develop and test the OX2 internal combustion engine, which shows every sign of living up to its promise. The OX2 engine is best described by Dr. Roberta Nichols, an engineering consultant for AET, as a "free piston engine, with fewer parts than a reciprocating engine, its operation more like a two-stroke engine, which should have the same superior power-to-weight ratio. Because of its small size, it could be a good choice for generator-type applications, including the hybrid powertrain for a vehicle."