Penetrating Oils
“Machinist’s Workshop” recently published information on various penetrating oils.
The magazine 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.
Thanks for the share, KE!
