Penetrating Oils
Machinist's Workshop Mag recently published some information on various penetrating oils that I found very interesting. Some of you might appreciate this. The magazine reports they tested penetrates for break out torque on rusted nuts. They are below, as forwarded by an ex-student and professional machinist. They arranged a subjective test of all the popular penetrates with the control being the torque required to remove the nut from a "scientifically rusted" environment.
Penetrating oils ........... Average torque load to loosen
No Oil used ............ ....... 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 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 about 20% of the price.