<font color='black' size='2' face='Arial, Helvetica, sans-serif'>I think it is more that the seals dry out and get brittle over time and the conditioners bring them back to how they were originally.<br>
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<div><font color="black" face="arial" size="2">Todd Markle</font></div>

<div><font color="black" face="arial" size="2">Spring Mills, Pa.</font></div>
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<div style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original Message-----<br>
From: Stephen Offiler <soffiler@gmail.com><br>
To: Antique Tractor Email Discussion Group <at@lists.antique-tractor.com><br>
Sent: Fri, Feb 15, 2019 7:32 am<br>
Subject: Re: [AT] OT - oil stop leak<br>
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<div dir="ltr">Mike:  I agree with John that the stop-leak works by swelling and softening the seals.  That said, my conclusion would be do NOT use it.  The seal has already worn, correct?  So if you soften it, it might slow or stop the leak temporarily at best, and then the softer seal will just die much quicker.
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<div>Steve O.</div>
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<div class="yiv0173404744gmail_attr" dir="ltr">On Fri, Feb 15, 2019 at 3:35 AM Mike M <<a href="mailto:meulenms@gmx.com" target="_blank" rel="noopener noreferrer" shape="rect" ymailto="mailto:meulenms@gmx.com">meulenms@gmx.com</a>> wrote:<br clear="none"></div>
<blockquote class="yiv0173404744gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;">Thank you John<br clear="none">
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Mike M<br clear="none">
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On 2/15/2019 2:55 AM, John Maddock wrote:<br clear="none">
> I've used Wynns Stop Leak (Australian) with success. Takes a few weeks to<br clear="none">
> do its work.<br clear="none">
><br clear="none">
> STP probably has a similar product.<br clear="none">
><br clear="none">
> As I understand it, the Stop Leak softens & slightly swells the leaking<br clear="none">
> rubber item - in my case a rocker cover gasket on one engine & valve stem<br clear="none">
> seals on another.<br clear="none">
><br clear="none">
> Definitely worth a try.<br clear="none">
><br clear="none">
> JV<br clear="none">
><br clear="none">
><br clear="none">
>> Hi, all, my wife has a 2010 Camry with 165,000 miles, it runs and drives<br clear="none">
>> like new. I noticed some oil puddles on the garage floor and when i<br clear="none">
>> crawled under it, it looked like it was coming from the transmission.<br clear="none">
>> Took it to the shop and they diagnosed as a leaking rear engine seal.<br clear="none">
>> Cost to fix it, $1600, they need to drop the engine and transmission.<br clear="none">
>> $140 is parts and the rest is labor. I'm not a big fan of stop leak<br clear="none">
>> products, but in this case, she can park on a piece of OSB to soak up<br clear="none">
>> the oil and Ill just have to check it more often. Has any one here have<br clear="none">
>> any experience with the stop leak products on the market? I really don't<br clear="none">
>> have much to lose.<br clear="none">
>><br clear="none">
>> Thanks, Mike M<br clear="none">
>><br clear="none">
>> ---<br clear="none">
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