Haze-free base oils with high paraffinic content

A method for reducing the cloud point of a base oil comprising a high saturates and paraffinic content to below 0° C., the method comprising:

• (a) combining the base oil with a solvent and a co-solvent to form a treatment mixture,
• wherein the solvent comprises a paraffinic naphtha fraction, and
• wherein the co-solvent comprises one or more of methyl isobutyl ketone, methyl butyl ketone, methyl propyl ketone, and methyl isopropyl ketone;
• and
• (b) cooling the treatment mixture to a temperature of less than −20° C. to form a wax crystal and a de-waxed mixture comprising a portion of the solvent and a de-waxed oil;
• (c) separating the wax crystal from the de-waxed mixture to form a separated de-waxed mixture comprising the portion of the solvent and the de-waxed oil;
• (d) distilling the separated de-waxed mixture to form a distilled solvent and a de-waxed oil, wherein the de-waxed oil comprises a cloud point below 0° C.