TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: Lubricating oil contains additive and lubricating oil base oil. The lubricating oil base oil is straight mineral oil, poly-(~a)-olefin, polybutene, fatty acid ester, polyalkylene glycol, phosphate ester, silicone, silicate ester, polyphenyl ether, alkylbenzene, synthetic naphthene, gas to liquid, ionic liquid or vegetable oil. Preferred Compound: The nitrogen-containing compound is of formula (2).R5=octadecenyl group;andR6=H or 1-30C hydrocarbon optionally containing oxygen, sulfur or nitrogen. Preferred Definitions:    R1=1-30C hydrocarbon, preferably 12-30C hydrocarbon, more preferably octadecenyl or octadecyl;and    R2-R4=H or 1-30C hydrocarbon, preferably hydrogen.    EXAMPLE - Thio urea (in g) (2), oleyl chloride (7.54) and ethanol (20 ml) were added and stirred at 70-80?oC for 24.5 hours in oil bath. The bottom solvent of reaction liquid was distilled-off in rotating evaporator and cooled to 15-25?oC. Then, diethyl ether (50 ml) was added to residue and filtered under reduced pressure, to obtain white solid precipitate. The obtained white solid precipitate was dried at 60?oC, to S-9-octadecenyl iso thiourea hydrochloride (5.25). Then, dichloromethane (6 ml) was mixed with the obtained S-9-octadecenyl iso thiourea hydrochloride (0.14), and aqueous solution-containing sodium hydrogencarbonate (1 weight%) were added into separating funnel, washed with distilled water and an organic layer was fractionated. Then, the filtration was carried out by spin-dehydration with anhydrous magnesium sulfate under reduced pressure. The bottom solvent of pressure reduction was distilled-off in the rotating evaporator, and dried at 25?oC under reduced pressure, to obtain S-9-octadecenyl iso thiourea (0.07) at yield of 30-6%. The S-9-octadecenyl iso thiourea subjected to elemental analysis contains carbon (69.98%), hydrogen (11.90), nitrogen (8.51) and sulfur (9.61). The obtained S-9-octadecenyl iso thiourea was used as additive to adipic acid di-(3,5,5-trimethyl hexyl) (10 mmol/kg), to obtain trial production oil of lubricating oil. The trial production oil of lubricating oil had favorable dynamic friction coefficient at different conditions.