A friend sent this to me and I thought this was worth sharing:
"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 particular test.
Our local 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 a 50/50 mix.
ATF = Any type of Automatic Transmission Fluid.
(This version of the story was in one of the Military Vehicle Club newsletters.)
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