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