FIELD: lubricating oils. SUBSTANCE: invention relates to oils applicable in oil and gas production industry and mechanical engineering for lubricating friction units in reduction gears of rocker-machines, straight bevel and spirally- conical transmissions exploited under low temperatures. Lubricating oil based on oil containing pentaerythritol ester of synthetic C5-C9- fatty acids with antiscuffing and antioxidant additives is supplemented by 10-30 vol % of xylene-ethylbenzene mixture boiling away within temperature range 136-141 C at xylenes to ethylbenzene volume ratio 1:1. EFFECT: improved low-temperature characteristics and extended choice of lube oils. 2 cl, 2 tbl
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