I have shamelessly copied this from another site:
*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% acetone - 50% automatic transmission fluid.*
*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. *
What is this? Replacing marketing hype and the way it has always been done with test data?
They didn't test spray silicone oil. I like it as a non gumming lube, and go ahead and use the same thing as penetrating oil.
Heat and quench works. For a time I worked in a brake shop. We salvaged many calipers with a broken bleed screw with what the owner called the heat wrench. It is much easier to reach for the torch before you bust something off.
Out in the field, a little gas may help. A good hammering does too. I usually give things a squirt of silicone and then hammer away.
*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% acetone - 50% automatic transmission fluid.*
*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. *
What is this? Replacing marketing hype and the way it has always been done with test data?
They didn't test spray silicone oil. I like it as a non gumming lube, and go ahead and use the same thing as penetrating oil.
Heat and quench works. For a time I worked in a brake shop. We salvaged many calipers with a broken bleed screw with what the owner called the heat wrench. It is much easier to reach for the torch before you bust something off.
Out in the field, a little gas may help. A good hammering does too. I usually give things a squirt of silicone and then hammer away.