<html><body>Food for thought<br><br><div class="reply-new-signature"></div><p>-----------------------------------------</p>From: gradea1@charter.net<br>To: "warthodson@aol.com"<br>Cc: <br>Sent: Sunday January 12 2020 10:18:59AM<br>Subject: Re: [Healeys] Does synthetic oil leak more?<br><br>
<p style="box-sizing: border-box; margin-bottom: 1em; font-size: 17px; line-height: 26px; overflow-wrap: break-word; color: rgb(33, 37, 41); font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif; background-color: rgb(255, 255, 255);">Found this info by looking for the molecule size of synthetic oil. Most conventional oil is about 2 microns and that is why we set our bearing clearance at .002 to allow the oil to pass. Early machining does not match what we have today with the close tolerances we can now achieve...so the finer synthetic runs out. If I run Redline in my Healey trans it ends up on the floor. Regular 30W stays in, and only leaves a quarter size puddle. Used lots of good sealant but that wont keep the new oils in if they are good soldiers:</p>
<p style="box-sizing: border-box; margin-bottom: 1em; font-size: 17px; line-height: 26px; overflow-wrap: break-word; color: rgb(33, 37, 41); font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif; background-color: rgb(255, 255, 255);">"The main difference between synthetic motor oil and conventional motor oil is found in their molecular structure. In a mineral oil, the molecules come from organic, natural materials, and as we know, nature isn't always consistent. There can sometimes be a few oddball molecules in mineral oils. <a target="_blank" href="https://auto.howstuffworks.com/under-the-hood/trends-innovations/synthetic-oil-technology.htm" style="box-sizing: border-box; color: rgb(11, 91, 164); text-decoration-line: none; background-color: transparent; border-bottom: 2px solid rgb(221, 221, 221);">Synthetic oils</a>, on the other hand, were created by scientists in a lab. The molecules are uniform, and they line up like good soldiers inside of your engine."</p>
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From: "warthodson--- via Healeys" <br>
To: ronfineesq@earthlink.net, vintage_roadster_restoration@hotmail.com, manifold@telus.net, 050.rpl@gmail.com, healeys@autox.team.net<br>
Cc: <br>
Sent: Sunday January 12 2020 9:44:13AM<br>
Subject: Re: [Healeys] Does synthetic oil leak more?<br>
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All I am saying is I find a lot of this hard to believe. For example: <span style="font-family: Arial; font-size: small; color: darkred;">Synthetic oil has much better cleaning properties, flows much better than conventional oil, and hence also lubricates much better than conventional oil. "</span><span style="font-family: Arial; font-size: small;">Much better" sounds good but is not very scientific. How much better, scientifically speaking? Just changing oil regularly does what you are taking about & none of it has to do with leaking unless you are counting on "sludge & gunk" to plug the leaking holes. Good Luck! Careful rebuilding including paying close attention to applying sealants where applicable, like bolt/screw threads when they are in contact with the oil will make a big difference. Re-tightening all the bolts after a break-in period will also assist. </span>
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<span style="font-family: Arial; font-size: small;">Gary Hodson</span>
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<b>From: </b><a target="_blank" rel="nofollow" shape="rect">Harold Manifold </a><br style="clear: none;">
<b>Sent: </b>January 11, 2020 10:53 AM<br style="clear: none;">
<b>To: </b><a target="_blank" rel="nofollow" shape="rect">warthodson@aol.com</a>; <a target="_blank" rel="nofollow" shape="rect">050.rpl@gmail.com</a>; <a target="_blank" rel="nofollow" shape="rect">healeys@autox.team.net</a><br style="clear: none;">
<b>Subject: </b>Re: [Healeys] Does synthetic oil leak more?
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<span style="FONT-SIZE:10pt;">Hello,</span>
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<span style="FONT-SIZE:10pt;">All of your observations are a factor. Here are some comments from an article about synthetic oil leaks:</span>
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Synthetic oil WILL NOT cause leaks. It may however make already worn-out gaskets/seals more evident, by leaking past them, and/or cleaning any sludge and other gunk that was sealing the existing leak. This is because Synthetic oil has much better cleaning properties, flows much better than conventional oil, and hence also lubricates much better than conventional oil (This is a good thing).
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<span style="FONT-SIZE:10pt;">I use a GL-4 synthetic gear oil in my transmission and it leaks. Believe it not not one of the leak mechanisms is from the interior along the bolts and drips from the bolt head on the exterior. I am changing the gaskets on my transmission and trying bonded sealing neoprene washers on the fasteners.</span>
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<span style="FONT-SIZE:10pt;">I may be pursuing the impossible dream of a leak free Healey.... Harold</span>
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<b><span lang="EN-US" style="FONT-SIZE:10pt;">From:</span></b><span lang="EN-US" style="FONT-SIZE:10pt;"> warthodson@aol.com [mailto:warthodson@aol.com] <br style="clear: none;">
<b>Sent:</b> Saturday, January 11, 2020 7:24 AM<br style="clear: none;">
<b>To:</b> manifold@telus.net; 050.rpl@gmail.com; healeys@autox.team.net<br style="clear: none;">
<b>Subject:</b> Does synthetic oil leak more?</span><span lang="EN-US"></span>
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<span style="FONT-SIZE:10pt;">I am not a leak expert, but I find this hard to understand. For there to be a leak there has to be a hole. Is it because the synthetic oil molecules are smaller than the non-synthetic oil molecules? Given that the "holes" come in different sizes this seems illogical. Is it because the synthetic oil is more slippery? How is that measured? How much more slippery is it? </span>
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<span style="FONT-SIZE:10pt;">Gary Hodson</span>
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<span style="FONT-SIZE:10pt;">-----Original Message-----<br style="clear: none;">
From: Harold Manifold <manifold@telus.net><br style="clear: none;">
To: 'R. Lindsay' <050.rpl@gmail.com>; 'Healey List' <healeys@autox.team.net><br style="clear: none;">
Sent: Fri, Jan 10, 2020 7:55 pm<br style="clear: none;">
Subject: Re: [Healeys] Rear Axle Oil</span>
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The biggest difference you will notice with synthetic gear oils is they leak<br style="clear: none;">
more than non-synthetic. </span>
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