OCP technology was used on conventional engines to improve their performance this then led to inaccurate reporting claiming that the Orbital Engine Technology had failed. However, this combination was deemed to be the most cost-effective direction because it eliminated production re-tooling costs, which were inhibiting factors for mass production using orbital engine hardware. Despite being offered A$12 million in 1973 for his stake in Orbital, Sarich refused to sell. BHP was an early investor in Sarich's Orbital Engine Company, taking a stake in the early 1970s that by 1989 represented 35% of the total company equity. The OCP component of the engine was described in the 1980s by the Jet Propulsion Laboratories (JPL) for NASA, as the "cutting edge of world engine technology". International emission testing laboratories confirmed the Australian results. Fuel economy advantages of 50% were demonstrated against the best outboard marine engines and 20–25% under typical automobile operating conditions. Additional savings of 5–10% were considered readily achievable with further development. The savings were accompanied by a massive reduction in the "direct engine out" of several key emissions gases. The OCP technology was sold as intellectual property (IP) to automobile, marine and motorcycle manufacturers and was incorporated in production engines to varying degrees; namely from complete systems to the improvement of their own technology, via knowledge gained from their IP purchases. All licensing payments were conditional upon the delivery of engines meeting numerous high emissions standards, fuel economies and other technical criteria. All deliveries met these criteria prior to Sarich's retirement in 1992, resulting in no dependent monetary penalties ever being incurred to that point in time. However, key components of Sarich's engine could not be cooled and others could not be readily lubricated. The engine was susceptible to overheating, and the invention was eventually deemed too impractical. In the United States Sarich sought A$100 million in investment from the Australian Government in order to commence manufacture of the engine in Australia. In 1989, the government offered an industry support package of A$1516.5 million, which Sarich declined, and he proceeded to make arrangements to establish operations in the United States. He floated Orbital Engine Corporation in the US via an initial public offering that raised A$113.8 million in 1992 and the company began trading on the New York Stock Exchange. In 1998, Sarich reported that Orbital Engine Corporation had entered into a nonexclusive licensing agreement with the Ford to