I just changed my oil mobil 1 5w30 when I was checking for leaks I noticed a slight knock from oil pan can only hear it when under truck by oil pan is this normal after oil change? Again I stress only very faint knock can not hear once you move a way from oil pan.

 

Update Took it out and ran it came home and knock either gone or so low could not hear it anymore.

 

ttt

 

Just a coincidence...dismiss it.

BfB

 

A number of members have posted about getting a slight knock after an oil change... it goes away after a few miles. No explaination yet.