摘要:
The lubricating base oil of the invention satisfies at least one of conditions (a) or (b) below. The lubricating oil composition for an internal combustion engine according to the invention comprises the lubricating base oil of the invention, an ashless antioxidant containing essentially no sulfur as a constituent element, and at least one compound selected from among ashless antioxidants containing sulfur as a constituent element and organic molybdenum compounds. Also, a lubricating oil composition for a power train device according to the invention comprises the lubricating base oil of the invention, a poly(meth)acrylate-based viscosity index improver and a phosphorus-containing compound.(a) The saturated component content is 90% by mass or greater, and the proportion of cyclic saturated components among the saturated components is 10-40% by mass.(b) The condition represented by the following formula (1) is satisfied. 1.440≦n20−0.002×kv100≦1.453 (1)[wherein n20 represents the 20° C. refractive index of the lubricating base oil, and kv100 represents the kinematic viscosity at 100° C. (mm2/s) of the lubricating base oil.]
摘要:
The lubricating oil composition of the invention comprises a lubricating base oil with a urea adduct value of no greater than 4% by mass and a viscosity index of 100 or higher, an ashless friction modifier at 0.01-10% by mass and a phosphorus-containing anti-wear agent at 0.01-0.2% by mass as phosphorus, based on the total amount of the composition.
摘要:
The invention provides a lubricating base oil with a saturated component content of 90% by mass or greater, a proportion of cyclic saturated components of no greater than 40% by mass of the saturated components, a viscosity index of 110 or greater, an aniline point of 106 or greater and an ε-methylene proportion of 14-20% of the total constituent carbons, as well as a lubricating oil composition comprising the lubricating base oil.
摘要:
A hydrocarbon-based lubricating base oil wherein a urea adduct value is not greater than 4% by mass, a viscosity index is 100 or higher, an average of carbon atoms number is 23-31 as determined by gas chromatography distillation, a value obtained by dividing an integral value of a peak in 30 ppm by an integral value of total peaks in the range of from 0 ppm to 50 ppm for the 13C-NMR spectrum is 0.1-0.2, and a product of a value obtained by dividing an integral value of peaks attributed to tertiary carbon atoms by an integral value of total peaks in the range of from 0 ppm to 50 ppm for the 13C-NMR spectrum, and the average of carbon atoms number, is 1.8-2.5.
摘要:
The present invention provides a lubricating base oil comprising saturated components of 90% by mass or greater, wherein the proportion of cyclic saturated components among the saturated components is not greater than 40% by mass, and by having a viscosity index of 110 or higher and an iodine value of not greater than 2.5. The lubricating base oil of the invention exhibits excellent viscosity-temperature characteristics and heat and oxidation stability while also allowing additives to exhibit a higher level of function when additives are included. The lubricating base oil of the invention is suitable for use in various lubricating oil fields, and is especially useful for reducing energy loss and achieving energy savings in devices in which the lubricating base oil is applied.
摘要:
The invention provides a lubricating base oil with a saturated component content of 90% by mass or greater, a proportion of cyclic saturated components of no greater than 40% by mass of the saturated components, a viscosity index of 110 or greater, an aniline point of 106 or greater and an ε-methylene proportion of 14-20% of the total constituent carbons, as well as a lubricating oil composition comprising the lubricating base oil.
摘要:
The lubricating base oil of the invention satisfies at least one of conditions (a) or (b) below. The lubricating oil composition for an internal combustion engine according to the invention comprises the lubricating base oil of the invention, an ashless antioxidant containing essentially no sulfur as a constituent element, and at least one compound selected from among ashless antioxidants containing sulfur as a constituent element and organic molybdenum compounds. Also, a lubricating oil composition for a power train device according to the invention comprises the lubricating base oil of the invention, a poly(meth)acrylate-based viscosity index improver and a phosphorus-containing compound. (a) The saturated component content is 90% by mass or greater, and the proportion of cyclic saturated components among the saturated components is 10-40% by mass. (b) The condition represented by the following formula (1) is satisfied. 1.440≦n20−0.002×kv100≦1.453 (1) [wherein n20 represents the 20° C. refractive index of the lubricating base oil, and kv100 represents the kinematic viscosity at 100° C. (mm2/s) of the lubricating base oil.]
摘要:
The lubricating oil composition of the invention comprises a lubricating base oil with a urea adduct value of no greater than 4% by mass and a viscosity index of 100 or higher, an ashless friction modifier at 0.01-10% by mass and a phosphorus-containing anti-wear agent at 0.01-0.2% by mass as phosphorus, based on the total amount of the composition.
摘要:
The lubricating base oil of the invention is characterized by satisfying at least one of the following conditions (a) or (b). (a) A saturated compound content of 95% by mass or greater, and a proportion of 0.1-10% by mass of cyclic saturated compounds among the saturated compounds. (b) The condition represented by the following formula (1). 1.435≦n20−0.002×kv100≦1.450 (1) wherein n20 represents the refractive index of the lubricating base oil at 20° C., and kv100 represents the kinematic viscosity (mm2/s) of the lubricating base oil at 100° C.
摘要:
The present invention provides a lubricating oil composition with excellent torque capacity and shifting characteristics suitable for use as automatic or continuously variable transmission fluids, which composition comprises a base oil and, on the basis of the total mass of the composition, (A) a sulfonate detergent in an amount of 0.01 to 0.3 percent by mass in terms of metal (MeA); (B) a salicylate detergent in an amount of 0 or more than 0 and 0.1 percent by mass or less, in terms of metal (MeB); and (C) a boron-containing succinimide type ashless dispersant in an amount of 0.001 to 0.1 percent by mass in terms of boron (BoC); (MeB)/(MeA) being 0, or greater than 0 and 1.5 or less, and (MeA)/(BoC) being from 0.001 to 20.