From: none@none.com99   
      
   On 9/30/2025 10:51 AM, Bob La Londe wrote:   
   > Good Soak For Rings In an Engine That's Been Sitting A Long Time???   
   >   
   > When I was a kid everybody said to dump a table spoon of Marvel Mystery   
   > Oil down each spark plug hole amd let it set for a few days to reduce   
   > the risk of cracking a ring when you start trying to move the engine.   
   >   
   >  From what I've heard and read they changed the formula of the snake oil   
   > and is not so good anymore. I don't know.   
   >   
   > Yesterday I heard a new one. Dump a mix of ATF and acetone in, and put   
   > the spark plug back so the acetone will force the ATF through the rings   
   > with pressure as it turns to vapor. I've never heard that one before. I   
   > have some reservations.   
   >   
   > I've got a 42 GPW (that was my dads) Jeep with a newer M38 Jeep engine   
   > that eventually I'd like to sell. Its been parked for 40 years so there   
   > will certainly be some tendency for the rings to stick. I'd prefer to   
   > sell as is and let somebody more expert than me deal with it, but I see   
   > no reason not to do little things to help that happen as time permits.   
   > Eventually being able to get compression on all cylinders might help...   
   > unless its bad of course.   
   >   
   > Anyway I'd like to hear what you guys know or have heard about soaking   
   > the rings in a sitting engine before trying to turn it over.   
   >   
   >   
   >   
      
   Acetone and ATF were by and large the biggest agent suggested with   
   Marvel Mystery Oil being a close second.  This doesn't mean Mystery Oil   
   is still good.  Nearly all of those who said they used it admitted they   
   have an old can that may not be the same as the new stuff.   
      
   Looks like acetone and ATF are the new shade tree mechanic approved   
   concoction.  I have Acetone and ATF on the shelf.  I don't have any   
   Marvel Mystery Oil.   
      
      
      
      
      
   --   
   Bob La Londe   
   CNC Molds N Stuff   
      
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