tuakangone 发表于 18-5-2013 04:10 PM 
1。 如果摩托车用汽车 API SM 的黑油 ， 它的牙箱几时才会坏？ 5 年 还是 10 年 ？ 还是 20 年后才坏 ？ ...
看来你还是不明白，api指数和牙箱是没有关系的，而且摩托车黑油也有api sm的啊！.gif)
基本上就是说汽车的黑油内并不含有润滑牙箱和clutch的成分，所以不适合在一般摩托车上使用（除了scooter，因为牙箱是由专用润滑油的）。
而你所说的testing lab，日本JASO已经做了，所以现在的摩托车黑油才会注明JASO MA/MA2。而JASO MA/MA2的标准，就是代表黑油里面含有适合润滑湿式Clutch的成分，至于为什么会坏，那是因为普通的汽车黑油不含JASO指标，所以会造成离合器打滑，进而损坏牙箱。
当然，如果你要用汽车黑油，短期内确实问题不大，但长久下来将会造成损坏。
来自wikipedia..虽然是英文，希望你能明白，别再混淆了，以免因小失大，造成摩托车牙箱提前报销。
For four-stroke gasoline engines, the JASO T904 standard is used, and is particularly relevant to motorcycle engines. The JASO T904-MA and MA2 standards are designed to distinguish oils that are approved for wet clutch use, and the JASO T904-MB standard is not suitable for wet clutch use. For two-stroke gasoline engines, the JASO M345 (FA, FB, FC) standard is used, and this refers particularly to low ash, lubricity, detergency, low smoke and exhaust blocking. These standards, especially JASO-MA (for motorcycles) and JASO-FC, are designed to address oil-requirement issues not addressed by the API service categories. One element of the JASO-MA standard is a friction test designed to determine suitability for wet clutch usage.[18][9] An oil that meets JASO-MA is considered appropriate for wet clutch operations. Oils marketed as motorcycle-specific will carry the JASO-MA label. 本帖最后由 修止符 于 18-5-2013 11:15 PM 编辑
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发表于 18-5-2013 07:12 PM
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