Lubricating oils (petroleum), hydrotreated solvent-refined bright stock-based A complex combination of hydrocarbons obtained by treatment of a solvent-refined residue with hydrogen. It consists predominantly of hydrocarbons having carbon numbers greater than C40 and produces a finished oil with a viscosity of between 450-500cSt at 40°C.

Lubricating oils (petroleum), hydrotreated spent A complex combination of hydrocarbons obtained by treating a spent lube oil with hydrogen in the presence of a catalyst. It consists predominantly of hydrocarbons having carbon numbers predominantly in the range of C15 through C50.

Lubricating oils (petroleum), C>25, hydrotreated bright stock-based A complex combination of hydrocarbons obtained by treating solvent deasphalted residual oil with hydrogen in the presence of a catalyst in two stages with dewaxing carried out between stages. It consists predominantly of hydrocarbons having carbon numbers predominantly greater than C25 and produces a finished oil with a viscosity of approximately 440cSt at 40°C. It contains a relatively large proportion of saturated hydrocarbons.

Lubricating oils (petroleum), used, noncatalytically refined A complex combination of hydrocarbons obtained by refining waste oils without catalytic treatment with hydrogen. It consists predominantly of hydrocarbons having carbon numbers predominantly in the range of C20 through C50 and produces a finished oil with a viscosity of at least 100 SUS at 100°F (19cSt at 40°C).

Lubricating oils (petroleum), acid-treated spent A complex combination of hydrocarbons obtained as a raffinate from a sulfuric acid treating process. It consists predominantly of hydrocarbons having carbon numbers predominantly in the range of C15 through C50.

Lubricating oils (petroleum), solvent-refined distd. used A complex combination of heavy hydrocarbons obtained by subjecting used lubricating oil to evaporation and extraction by solvent.