LUBRICATING OIL COMPOSITION FOR DIESEL ENGINE Russian patent published in 2020 - IPC C10M169/04 C10M145/14 C10M105/34 C10M105/78 C10N30/02 C10N40/25 

FIELD: lubricants.

SUBSTANCE: present invention discloses a lubricating oil composition for diesel engines, which comprises: a) base oil with kinematic viscosity, at 100 °C making 4.5 to 5.5 mm²/s, consisting either of one base oil of GTL with kinematic viscosity, at 100 °C making 4.5 to 5.5 mm²/s, or mixture (i) of base oil GTL with kinematic viscosity at 100 °C of 3.0 to 6.0 mm²/s and (ii) GTL base oil with kinematic viscosity at 100 °C of 7.0 to 13 mm²/s, wherein the base oil is present in amount of 60 to 90 wt % with respect to the total weight of the lubricating oil composition, b) an improved viscous index improver based on comb polymethacrylate, present in an amount in range of 1.0 to 6.0 wt % with respect to the total weight of the lubricating oil composition; and c) a boron-containing dispersant and a boron-containing detergent, wherein the total amount of the boron-containing dispersant and the boron-containing detergent included in the conversion into boron content with respect to the total amount of the composition is not less than 0.025 wt % and not more than 0.050 wt %.

EFFECT: disclosed composition corresponds to 0W-30 or 5W-30 in SAE J300 standard.

3 cl, 3 tbl