The channel Project Farm on YouTube investigated penetrating oils and other options for loosening rusty bolts. Eight options were evaluated, including a control group, to determine which was most effective.
treatment - The different treatments tried: none (control), Heat (via blow torch), Acetone/ATF, AeroKroil, Liquid Wrench, PB Blaster, Royal Purple, and WD-40.
torque - Torque required to loosen the rusty bolt, which was measured in foot-pounds.
Source
https://www.youtube.com/watch?v=xUEob2oAKVs
Use the following R code to directly access this dataset in R.