[Healeys] Does synthetic oil leak more?

Jean Caron vintage_roadster_restoration at hotmail.com
Sat Jan 11 09:57:54 MST 2020

It is possible to have a leak free Austin-Healey, once the oil has all drained out!!!!!!!


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From: Harold Manifold<mailto:manifold at telus.net>
Sent: January 11, 2020 10:53 AM
To: warthodson at aol.com<mailto:warthodson at aol.com>; 050.rpl at gmail.com<mailto:050.rpl at gmail.com>; healeys at autox.team.net<mailto:healeys at autox.team.net>
Subject: Re: [Healeys] Does synthetic oil leak more?


All of your observations are a factor. Here are some comments from an article about synthetic oil leaks:

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).

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.

I may be pursuing the impossible dream of a leak free Healey.... Harold

From: warthodson at aol.com [mailto:warthodson at aol.com]
Sent: Saturday, January 11, 2020 7:24 AM
To: manifold at telus.net; 050.rpl at gmail.com; healeys at autox.team.net
Subject: Does synthetic oil leak more?
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?
Gary Hodson
-----Original Message-----
From: Harold Manifold <manifold at telus.net>
To: 'R. Lindsay' <050.rpl at gmail.com>; 'Healey List' <healeys at autox.team.net>
Sent: Fri, Jan 10, 2020 7:55 pm
Subject: Re: [Healeys] Rear Axle Oil

The biggest difference you will notice with synthetic gear oils is they leak
more than non-synthetic.

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