LUBRICANTS WITH MAGNESIUM AND THEIR USE FOR REDUCTION OF PREMATURE IGNITION OF MIXTURE AT LOW RPM Russian patent published in 2020 - IPC C10M159/20 C10M159/24 C10M129/26 C10M169/04 C10M171/00 C10N30/02 C10N10/04 

FIELD: butter industry; engines and pumps.

SUBSTANCE: lubricating oil composition contains more than 50 wt % base oil selected from a group consisting of base oil of I group, base oil of II group, base oil of III group, base oil of IV group, base oil V group and mixtures thereof; detergent additive of the overbased calcium sulphonate with total alkaline number from 225 to 400 mg KOH/g, by the measured method according to ASTM D-2896, detergent additive of overbased magnesium sulphonate, detergent additive of overbased magnesium phenolate, detergent additive of overbased magnesium salicylate or their mixture in amount, providing from 50 to 1000 ppm by weight of magnesium in the lubricating oil composition, and one of: (a) detergent additive of overbased calcium phenolate or calcium salicylate with total alkaline value from more than 225 to 400 mg KOH/g, measured method according to ASTM D-2896, and (b) detergent additive of low-basic calcium sulphonate, detergent additive of low-basic calcium phenolate, detergent low-basic calcium salicylate or mixture thereof with total alkaline number of up to 175 mg KOH/g, measured by ASTM D-2896 method, in amount, providing at least 50 ppm by weight of calcium in the lubricating oil composition relative to the total weight of the lubricant composition, wherein said lubricating oil composition contains an amount of overbased calcium-containing detergent, which provides from 900 ppm by weight to less than 1800 ppm by weight of calcium in the lubricating oil composition based on the total weight of the lubricating oil composition, and total content of calcium in lubricating composition is up to 1800 ppm relative to total weight of lubricating oil composition; and said lubricating oil composition passes the test according to TEOST-33.

EFFECT: disclosed is a lubricating oil composition, use and method of operating an internal combustion engine.

21 cl, 6 tbl, 3 ex