572.    ---------------.[CLAR, -----.]  [Lubricating Oil From Synthetic Gasoline.]  FIAT Reel K28, frames 6120-6145, May 11, 1941; PB 70,185; TOM Reel 295.

      Fractions of a cracked gasoline boiling within a narrow range and purified over metallic Na were used for the synthesis of lubricating oil.  Comparison of the oils prepared from the fractions in a single synthesis shows an improvement in the viscosity-pole height and a deterioration of the Conradson test with increasing chain length while the aniline point and the I number decrease with rising molecular weight.  A higher stability of the polymerizates obtained from C13 and C14 fractions, compared with those obtained from the C6 to C11 fractions, has been established by artificial aging.  Acids, esters, and aldehydes are noxious; this is proved by the fact that after their elimination the viscosity-pole height and the Conradson test improve