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首先，请你搞清楚基础油的五个分类：[align=center][b][color=#000080]SYNTHETIC LUBRICANTS WHAT ARE THEY[/color][/b]
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[b][font=Arial][size=3][color=#ff0000]There are five specific categories of base oils.[/color][/size][/font][/b] These categories define the type of base stock the oil is formulated from. The categories are as follows. Note that the base oil group category is followed by the manufacturing method (in bold print) and then a description of the oil characteristics for each category.
[align=left][color=#000080][/color] [/align][align=left][color=#000080][b]Group I - Solvent Freezing:[/b] [/color][/align][align=left]Group 1 base oils are the least refined of all the groups. They are usually a mix of different hydrocarbon chains with little or no uniformity. While some automotive oils on the market use Group I stocks, they are generally used in less demanding applications. [/align][align=left][color=#000080][/color] [/align][align=left][color=#000080][b]Group II - Hydro processing and Refining:[/b] [/color][/align][align=left]Group II base oils are common in mineral based motor oils currently available on the market. They have fair to good performance in lubricating properties such as volatility, oxidative stability and flash/fire points. They have only fair performance in areas such as pour point, cold crank viscosity and extreme pressure wear. [/align][align=left][color=#000080][/color] [/align][align=left][color=#000080][b]Group III–Hydro processing and Refining:[/b] [/color][/align][align=left]Group III base oils are subjected to the highest level of mineral oil refining of the base oil groups. Although they are not chemically engineered, they offer good performance in a wide range of attributes as well as good molecular uniformity and stability. They are commonly mixed with additives and marketed as synthetic or semi-synthetic products. Group III base oils have become more common in America in the last decade. [/align][align=left][color=#000080][/color] [/align][align=left][color=#000080][b]Group IV -Chemical Reactions:[/b] [/color][/align][align=left]Group IV base oils are chemically engineered synthetic base stocks. Polyalphaolefins (PAO's) synthetics, when combined with additives, offer excellent performance over a wide range of lubricating properties. They have very stable chemical compositions and highly uniform molecular chains. Group IV base oils are becoming more common in synthetic and synthetic-blend products for automotive and industrial applications.[b] The future belongs to the Group IV basestocks (AMSOIL Synthetic Oils are Group IV Polyalphaolefins). [/b][/align][align=left][b][color=#000080][/color][/b] [/align][align=left][b][color=#000080]Group V - As Indicated:[/color] [/b][/align][align=left]Group V base oils are used primarily in the creation of oil additives. Esters and polyolesters are both common Group V base oils used in the formulation of oil additives. Group V oils are generally not used as base oils themselves, but add beneficial properties to other base oils. [/align]
[align=left]Note that the additives referred to in the Group V description are not aftermarket type oil additives. The additives referred to are used in the chemical engineering and blending of motor oils and other lubricating oils by the specific oil company that produces the finished product.[/align]
[align=left]请搞清楚第五类基础油的用途：[/align]
[align=left][color=red]Group V base oils are used primarily in the creation of oil additives. [/color][/align][align=left][color=black]五类基础油通常主要用于制造油品添加剂[/color][/align][align=left][color=red][/color] [/align][align=left][color=red]Esters and polyolesters are both common Group V base oils used in the formulation of oil additives.[/color][/align][align=left][color=black]脂类和复合脂都是常见的用来制造油品添加剂的五类基础油[/color][/align][align=left][color=red][/color] [/align][color=red]Group V oils are generally not used as base oils themselves, but add beneficial properties to other base oils.[/color][align=left][color=black]五类油通常并不能直接作为基础油，而是用来改良其他基础油[/color][/align]
[align=left]搞清楚之后，咱们再来讨论一下机油的分类[/align] 补充一下：API对于基础油级别的划分：
Group I base stocks contain less than 90 percent saturates and/or greater than 0.03 percent sulfur and have viscosity index greater than or equal to 80 and less than 120.
Group II base stocks contain greater than or equal to 90 percent saturates and less than or equal to 0.03 percent sulfur and have viscosity index greater than or equal to 80 and less than 120.
Group III base stocks contain greater than or equal to 90 percent saturates and less than or equal to 0.03 percent sulfur and have viscosity index greater than or equal to 120.
Group IV base stocks are polyalphaolefins (PAO).
Group V base stocks include all other base stocks not included in groups I, II, III or IV. LZ 翻译中文 周大哥的专业令小弟佩服。 {:3_55:}没有啦。。大家讨论。。。。。 周兄太认真了 :D 周大哥大惊了。。。。 有些事要认真的 还要是必须 别老给某些人毒害 [b] [url=http://www.sibalu.com/redirect.php?goto=findpost&pid=90396&ptid=8680]1#[/url] [i]pro_romeo[/i] [/b]
一起讨论英文, 很好, 我喜欢.
关于第5类基础油为什么比第4类基础油, 也就是PAO强大, 为什么要宣传使用POLY ESTER以显示比PAO更强大的性能, 你可以看看REDLINE红线公司的官方视频介绍. .
记住, 一定要打开你PC的喇叭, 听懂了, 咱们在讨论: ESTER基础油为什么比PAO牛B..也不迟.,
[url]http://www.redlineoil.com/products_motoroil.asp?productID=45&synthFlash=1&subcatID=14[/url]
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