FIELD: lubricants. SUBSTANCE: calcium sulfonate, sulfurized C9-C12-alkylphenols, calcium salt of the latter with alkalinity 140-250 mg KOH/g, and dithiophosphoric acid salts are mixed at elevated temperature and resulting mixture is taken to mixing apparatus at an angle 18-36 C, while oil-diluent is introduced into this apparatus axially, after which the total is stirred at (1,5-4,0)•103 rpm. Method is suitable for diesel oil production. EFFECT: enhanced (by 10-20%) functional properties of additive pack and lubricating oils.
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