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Penetrating Oils 

“Machinist’s Workshop” recently published information on various penetrating oils. The mag reports they tested these products for “break out “torque” on rusted nuts and bolts. A subjective test was made of popular penetrating oils, with the unit of merit being the torque required to remove the nut from a “scientifically rusted” bolt.  Average torque load to loosen nut:

 

No Oil used ……………………516 foot pounds

WD-40 ………………… ……..238 foot pounds

PB Blaster …………………….214 foot pounds

Liquid Wrench ………………….127 foot pounds

Kano Kroil …………………….106 foot pounds

ATF/Acetone mix…………………. 53 foot pounds

 

The ATF/Acetone mix is a “home brew” mix of 50/50 automatic transmission fluid and acetone. Note this “home brew” released bolts 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 almost as good as Kroil for 20% of the price.

 

ATF/Acetone mix is best, but you can also use ATF and lacquer thinner in a50/50 mix. ATF = Any type of Automatic Transmission Fluid. This version of the story was in one of the Military Vehicle Club newsletters.

 

1957 CMC Classic Speedster

    in Ft Walton Beach, FL

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