As a final summary of the author's analysis of the Packard diesel engine, it must be emphasized that although the engine burned a much cheaper and safer fuel more efficiently than any of its gasoline rivals, it was too unreliable to compete with them. Even if it had been reliable, it was too small to be useful to the large transport operators, to whom its fuel economy would have appealed. In addition, this mechanism operated on the wrong cycle: 4-stroke, rather than the lighter, more compact, and more efficient blown 2-stroke cycle. Lastly, it was doomed by the advent of high octane gasolines, first used while it was still in the development stage. These new fuels reduced the diesel's advantage resulting from low fuel consumption, and, in addition, gave the gasoline engine a definite advantage from the standpoint of performance. The Packard diesel was a daring design but, for the reasons analyzed in this chapter, it could not meet this competition, and therefore failed to survive. Appendix 1. Agreement between Hermann I. A. Dorner and Packard Motor Car Company THIS AGREEMENT made this 18th day of August 1927, by and between HERMANN DORNER, of Hanover, Germany, hereinafter referred to as "Licensor", and PACKARD MOTOR CAR COMPANY, a Corporation of the State of Michigan, United States of America, of Detroit, Michigan, hereinafter referred to as "Licensee"; WITNESSETH, that WHEREAS, Licensor owns certain Letters Patent of the United States and other countries relating to oil burning engines under which he desires to license the Licensee; WHEREAS, Licensee desires rights under said Letters Patent; NOW, THEREFORE, for the mutual considerations hereinafter set forth, the parties have agreed as follows: 1. Licensor warrants that he is the inventor of an oil burning engine, is the sole owner of United States patent Number 1,628,657, dated May 17, 1927, and United States patent applications, Serial Numbers 46,383 filed July 27, 1925, and 88,409 and 88,411, filed February 15, 1926, relating to such engines and is joint or sole owner of patents or patent rights relating to said engines in England, Germany and Sweden. 2. Licensor agrees to furnish the Licensee at cost price but not exceeding Thirty Dollars ($30.00) cash, as many pump and nozzle units as are needed for use in building one or more experimental engines.