I found this on another forum:
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In the Apr/May 2007 issue of Machinist's Workshop magazine the author did an interesting test of penetrating oils where he measured the force required to loosen rusty test devices. Get the issue if you want to see how he did the test. But, I thought the results he reported were interesting.
Pentrating oil / Average load / Price perfluid ounce
None / 516 pounds /
WD-40 / 238 pounds / $0.25
PB Blaster / 214 pounds / $0.35
Liquid Wrench / 127 pounds / $0.21
Kano Kroil / 106 pounds / $0.75
ATF-Acetone mix / 53 pounds / $0.10
The ATF-Acetone mix was mixed 1 to 1 ratio.
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In the Apr/May 2007 issue of Machinist's Workshop magazine the author did an interesting test of penetrating oils where he measured the force required to loosen rusty test devices. Get the issue if you want to see how he did the test. But, I thought the results he reported were interesting.
Pentrating oil / Average load / Price perfluid ounce
None / 516 pounds /
WD-40 / 238 pounds / $0.25
PB Blaster / 214 pounds / $0.35
Liquid Wrench / 127 pounds / $0.21
Kano Kroil / 106 pounds / $0.75
ATF-Acetone mix / 53 pounds / $0.10
The ATF-Acetone mix was mixed 1 to 1 ratio.