Patent ID: 8236741

Claim:
A method for reducing the haze observed on standing at ambient temperature in Gas-to-liquids (GTL) base stock(s) and/or base oil(s) having a kinematic viscosity @100° C. of about 8 mm 2 /s or higher to a level evidencing an NTU value of about 2.0 NTU or less at 20° C.±1° C. for at least 13 days by the addition to the GTL base stock(s) and/or base oil(s) of an additive of polymer II which is a mixture of (a) wherein R 8 is C 10 to C 12 alkyl and mixtures thereof, x is oxygen or nitrogen and s+t together are sufficient to produce the co-polymer having a weight average molecular weight of about 800 to about 1000, and (b) wherein R 9 is C 12 to C 14 alkyl and mixtures thereof, X is oxygen or nitrogen wherein at least some percentage of x is nitrogen, and u and v together are sufficient to produce the copolymer having a weight average molecular weight of about 7000 to about 8,000 and (a) and (b) are in a ratio of about 60:40.