A lube base oil which comprises at least one hydrocarbon compound having as the basic skeleton a structure represented by any of the general formulae (I) to (VI) and has a viscosity at −40° C. of 40 Pa·s or lower and a viscosity index of 80 or higher, (wherein p is an integer of 1 to 10, provided that in the formulae (I) and (II), p is not 1). It satisfies the coefficient of high-temperature traction, low-temperature flowability, and viscosity index on a high level.
润滑基础油至少包含一种碳氢化合物,其基本骨架由通式(I)至(VI)中的任意一种所表示的结构组成,在-40℃时具有40 Pa·s或更低的粘度,且粘度指数为80或更高(其中p是1至10的整数,但在式(I)和(II)中,p不为1)。它在高温牵引系数、低温流动性和粘度指数方面均具有高
水平的满足。