Originally Posted by
WizardOfBoz
I believe that there have been tests done using penetrating oils, and that they have been shown significantly reduce (in some cases by 90%) the torque needed to break free artificially rusted bolts. My experience agrees with this: penetrating oil works on rusty bolts. If there are tests (physical tests, not theoretical models*) that prove no benefits for PO, can you share them?
*I'm an engineer that writes models based upon theory, so I like them. But data trumps theory here.
Thats great, then please explain how oil breaks a rusted bolt free. There is no likely mechanism for that to occur. Initial torque is the same. Same with at stuck seatpost, No amount of kroil or any other penetrating oil will do anything to unstick it. - I may help some once the oxidation IS broken free.