661.    DANNEFELSER, W.  [Knock Measurements on Synthetic Gasoline.]  Oel u. Kohle Erdoel Teer, vol. 38, 1942, pp. 363-365; Chem. Abs., vol. 37, 1943, p. 6442.

     Virtually no resin formation occurs when gasoline obtained by the Fischer-Tropsch synthesis process is stored, and the mono-olefin content (30-40%) remains unchanged.  In general, peroxides are not formed during prolonged storage of large batches of gasoline.  Signs of peroxidation have been observed with small batches, for example, the octane number of a sample stored for 15 months in a sealed can was lowered by 3 units.  o-Cresol is recommended as a peroxide inhibitor.  Samples when tested for knock rating after being taken from a refrigerator gave an octane number 1 unit higher than when tested at room temperature.