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Ran across this post. Thought you might find it interesting.







Machinist's Workshop magazine actually tested penetrants for break out torque on rusted nuts.

Significant results! They are below, as forwarded by an ex-student and professional machinist, Bud Baker.

*Don't forget the April 2007 "Machinist's Workshop" magazine comparison test.*

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*They arranged a subjective test of all the popular penetrants with the control being the torque required to remove the nut from a "scientifically rusted" environment. *

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*Penetrating oil ..... Average load*



None ...................... 516 pounds

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

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

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

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

ATF-Acetone mix.......53 pounds



*The ATF-Acetone mix was a "home brew" mix of 50 - 50 automatic transmission fluid and acetone.*

*Note the "home brew" was better than any commercial product in this one particular test.

Our local machinist group mixed up a batch and we all now use it with equally good results.

Note also that "Liquid Wrench" is about as good as "Kroil" for about 20% of the price. *

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