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Old 01-07-2013, 10:02 PM
Roger Roger is offline
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Join Date: Dec 1999
Location: McMurray, PA
Posts: 5,819
I found this on another forum frequented by those doing mechanical projects, FWIW. I have no experience with these suggestions, just passing along the post for elsewhere, info that might be useful in this project. (The post should be ft-pounds, not just pounds - the measurements are torque.)

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Machinist's Workshop Mag recently published some information on various penetrating oils that I found very interesting. The magazine reports they tested penetrates for break out torque on rusted nuts. They are below, as forwarded by an ex-student and professional machinist. They arranged a subjective test of all the popular penetrates with the control being the torque required to remove the nut from a "scientifically rusted" environment.


Penetrating oils Average torque to loosen

No Oil used ................... 516 pounds

WD-40 ...................... ... 238 pounds

PB Blaster .................... 214 pounds

Liquid Wrench ...............127 pounds

Kano Kroil .................... 106 pounds

ATF.................................53 pounds

Power Steering Fluid.........51 pounds

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Somebody else chimed in saying that he has used ATF and Acetone (1:1) for over 20 years, ... best penetrating oil he found.
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