增加机油粘度
Increase the viscosity of the engine oil
以上为机器翻译结果，长、整句建议使用 人工翻译 。
柴油机油引起的粘度增长不仅缩短了柴油机的使用寿命，而且增加了零部件的磨损。
With the increasing soot level contaminating lubricating oil, the oil viscosity increase and wear of engine components become more severe. And it shortens the life of engine.
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