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Better than PB blaster and Kano Kroil

Discussion in '40- & 55-Series Tech' started by MtnClimber, Mar 29, 2010.

  1. MtnClimber


    Likes Received:
    Nov 30, 2008
    Lewiston, ME
    Just an exerpt of an article posted on another forum. Thought it would be good info for wrenchers...

    "The April/May 2007 edition of Machinist's Workshop did a test of penetrating oils where they measured the force required to loosen rusty test devices. Buy the issue if you want to see how they did the test. The results reported were interesting. The lower the number of pounds the better. Mighty interesting results for simple acetone and tranny fluid!

    Penetrating oil . Average load .. Price per fluid 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 a 50/50 mix (1 to 1 ratio)."

    The author of the original article has confirmed this on the MW forum. (General - The Home Shop Machinist & Machinist's Workshop BBS)

    Personally, I've used the ATF-Acetone mix and had very good results. I believe that what's happening is that the acetone breaks down the surface tension of the ATF which allows it to penetrate into the threads. Then the acetone evaporates, leaving the ATF to break down the rust a bit and act as a lubricant."
    89cruiserfj62 likes this.
  2. My wife said no FJ!

    My wife said no FJ!

    Likes Received:
    Jul 26, 2007
    Interesting :hmm:

    How about time...how long did they let it set/soak before attempting to work into the rust?
  3. Relix


    Likes Received:
    Sep 19, 2005
    Chandler, AZ
    good stuff, I was replacing my radiator yesterday, and could have used this info on some of the more stubborn bolts yesterday... WD40 worked well enough for me...
  4. General Automag

    General Automag

    Likes Received:
    Dec 27, 2009
    North America
    A better penetrating oil

    Take the Acetone/ATF mix and add kerosene (1/3 Acetone, 1/3 ATF and 1/3 kerosene).

    See Coolerman's website at Ed's Red Penetrating Oil.

    I'm working on a restoration now and have been using it along with WD40 and PB Blaster (get the cheaper PB Blaster in 1 gallon cans plus you get a metal spray bottle that won't leak like the plastic ones). It works good as an undercoating spray as well just to keep everything coated. I put in some lanolin as well even though I use gloves. Melt the lanolin in a microwave to get it liquified before you mix it. It's still not cheap but is less expensive than Kroll or PB Blaster by the gallon.