US 2026/0234498 A1 · HIGH PERFORMANCE GEAR OILS AND RELATED METHODS

Abstract

Gear oil compositions and methods of making the same. Gear oil compositions may comprise: a base oil comprising a Group II/II+ extra heavy neutral oil base stock and a Group V oil base stock; and a performance additive package, where the gear oil compositions exhibit, as compared to a corresponding gear oil composition wherein 40 weight percent (wt. %) or more of the Group II/II+ extra heavy neutral oil base stock is replaced with a Group IV oil base stock, a property selected from the group consisting of: equivalent or reduced copper corrosion, rust formation, pour point, wearing, oxidation; equivalent or increased demulsibility, and any combination thereof. Methods of improving low temperature fluidity and/or oxidation stability of a gear oil composition may comprise providing said base oil, optionally providing said performance additive package, and optionally, blending said base oil with said performance additive package, thereby forming said gear oil composition.

Claims20

Dependent claims

A gear oil composition, comprising:

a base oil comprising a Group II/II+ extra heavy neutral oil base stock and a Group V oil base stock, and
a performance additive package;
wherein the gear oil composition exhibits, as compared to a corresponding gear oil composition wherein 40 weight percent (wt. %) or more of the Group II/II+ extra heavy neutral oil base stock is replaced by a Group IV oil base stock, a property selected from the group consisting of:
equivalent or reduced copper corrosion, determined by ASTM D130;
equivalent or reduced rust formation, determined by ASTM D665;
equivalent or reduced pour point, determined by ASTM D97;
equivalent or increased demulsibility, determined by ASTM D1401 or ASTM D2711;
equivalent or decreased wearing, determined by ASTM D2783 or ASTM D4172;
equivalent or reduced oxidation, as determined by ExxonMobil B10 oxidation test or ASTM D2272 or ASTM D2893, and
any combination thereof.

7 more elements

A method for producing a gear oil composition, the method comprising:

providing a base oil for a gear oil composition, the base oil comprising a Group II/II+ extra heavy neutral oil base stock and a Group V oil base stock;
optionally, providing a performance additive package;
and
optionally, blending the base oil with a performance additive package,
thereby forming a gear oil composition exhibiting, as compared to a corresponding gear oil composition wherein 40 weight percent (wt. %) or more of the Group II/II+ extra heavy neutral oil base stock is replaced by a Group IV oil base stock, a property selected from the group consisting of:
equivalent or reduced copper corrosion, as determined by ASTM D130;
equivalent or reduced rust formation, as determined by ASTM D665;
equivalent or reduced pour point, as determined by ASTM D97;
equivalent or increased demulsibility, as determined by ASTM D1401 or ASTM D2711;
equivalent or decreased wearing, determined by ASTM D2783 or ASTM D4172;
equivalent or reduced oxidation, as determined by ExxonMobil B10 oxidation test or ASTM D2272 or ASTM D2893, and
any combination thereof.

9 more elements

Dependencies are inferred from the claim text.

High performance gear oils and related methods

Life of this patent

High performance gear oils and related methods

Life of this patent

Abstract

Claims20