To keep the inside working parts of your engine clean, use engine oil and fuel that have tested engine cleaning properties.

为保持引擎内部工作部件的清洁，使用经检测具有清洁引擎性能的机油和燃料。

youdao

Slowly pour in new engine oil using a clean container or a fuel nozzle.

使用干净的容器或加油嘴缓缓倒入新的发动机机油。

youdao

Check, maintain and clean the diesel-engine generator sets, compressor, oil and water supply equipment, etc. and keep them in work condition.

检查、维保和清洁柴油发电机组、压缩机、供水供油设备，保证其良好的工作状况。

youdao