This was posted over at Dodgecoronet.com:
"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 a 50/50 mix. ATF = Any type of Automatic
Transmission Fluid.
