What can happen if hoses and remote lines are not cleaned before a new oil is used?

When hoses and remote lines are not properly cleaned before using new oil, contamination of the new oil is a significant risk. Over time, residues from previous fluids or debris that may have accumulated in the hoses and lines can mix with the new oil. This contamination can introduce particles, moisture, or other foreign substances into the new lubricant, which adversely affects its performance and reliability.

Contaminated oil can lead to several issues, including reduced lubrication properties, increased wear and tear on moving parts, and potential failure of the machinery or equipment that the oil is intended to protect. Maintaining clean components is essential in ensuring that the new oil can perform at its intended efficiency and effectively safeguard the machinery from wear.

In contrast, increased lubrication efficiency and improved filter performance suggest enhancements to the oil's condition which would not occur if contamination is present. Therefore, without proper cleaning, these outcomes are unlikely to happen.