Loosening rusted bolts and nuts

[Richard Wooldridge]

In an email from my brother:
You guys may be interested in some interesting information that I found in the Studebaker Drivers Club rag. They gleaned it from another magazine, the Machinist's Workshop rag. It has to do with loosening of rusted bolts, and penetrants contribution to that effort. It was from an experiment repeated many times, them averaging the results for each penetrant. Every effort was made to ensure eveness in the rusting.
Penetrant Average Torque
None 516 lbs
WD40 238 lbs
PB Blaster 214 lbs
Liquid Wrench 127 lbs
Kano Kroil 106 lbs
ATF-Acetone mix 53 lbs

It would appear that WD40 and PB Blaster aren't nearly as effective as liquid wrench or Kano Kroil, but the home-brew mix of ATF and Acetone is a real winner.