FIELD: lubrication compositions.
SUBSTANCE: present invention relates to lubricating compositions containing a Fischer-Tropsch derived extra heavy base oil and an alkylated aromatic blendstock wherein the FT extra heavy base oil has a kinematic viscosity at 100°C in the range from 19 to 35 mm2/s. Also disclosed is a method of making a lubricating composition, which comprises blending a FT derived extra heavy base oil failing the “clear and bright” standard (ASTM D4176) with an alkylated aromatic blendstock to provide a lubricating composition that passes the “clear and bright” standard.
EFFECT: invention relates to lubricating compositions comprising a Fischer-Tropsch derived base oil with waxy haze components, which nevertheless have a clear and bright appearance.
12 cl, 8 tbl, 2 ex
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