The following, copied from a RV group, might help!

Rusted Stud Removal

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.

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.

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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