Meaning of residual oil

1. The cleanup crew had to remove the residual oil left behind after the spill.
2. The engine needed to be flushed to get rid of the residual oil buildup.
3. The garage recommended using a specific detergent to remove residual oil stains from the driveway.
4. The pipeline leaked, leaving residual oil seeping into the ground.
5. The mechanic found residual oil in the air filter, indicating a possible issue with the engine.
6. The environmental impact of the spill was worsened by the presence of residual oil in nearby water sources.
7. The factory had to implement new protocols to prevent residual oil from contaminating the surrounding soil.
8. The old machinery was covered in residual oil, making it difficult to clean and maintain.
9. The scientist studied the effects of residual oil exposure on marine life in the affected area.
10. The company invested in new technology to reduce the amount of residual oil waste produced during manufacturing processes.