Just to be fair I should post this, it’s been floating around for a long time and don’t know
just how scientific the test was or how consistent the samples were.
But the Machinist Workshop magazine studied the most popular penetrating oils to see
what did the best job of removing rusted bolts by measuring the pounds of torque
required to loosen the bolt. I'm not sure just what flavor bolt they were using
that would take 516 pounds of torque but it must have been a monster.
These were the results they published:
Penetrating oil: Average load:
None...................................516 lbs.
WD-40.................................238 lbs.
PB Blaster.............................214 lbs.
Liquid Wrench........................127 lbs.
Kano Kroil..............................106 lbs.
ATF-Acetone mix......................53 lbs.
“The Auto Trans fluid- acetone mix was a "home-brew" mix of 50-50 ATF-acetone.
The home brew tested better than the commercial products in this test. Note that
Liquid Wrench is about as good as "Kroil" for about 20% of the price.”
Then there’s always these “best ever” penetrating oils.
Mouse Milk Penetrating Oil, Motion Penetrating Oil, The Blue Wrench, Knocker-Loose
by K-N, CRC 5-56, Castle Thrust Penetrating Oil, Calfonex, Gibbs Brand, Sea Foam
deep creep, Loctite Freeze & Release, Chrysler foaming rust penetrant with graphite,
Heat and wax, Mopar Rust Penetrant, P/N 04318039AB, Royal Purples Maxfilm.
Denny Graham
Sandwich, IL
Last edited by Denny Graham; 12/10/2011 4:50 PM.
