Why is it important to change the oil when the pump is hot?

As the pump cools, the moisture and contaminants start to separate in the pump and when drained, the contaminants cling to the walls of the pump, causing the new oil to quickly become contaminated when added. 

Minipack does not assume any responsibility or liability for the advice given and shall not be liable for any direct, indirect, special, incidental or consequential damages in connection with the use of this information.