[Healeys] Does synthetic oil leak more?

warthodson at aol.com warthodson at aol.com
Sun Jan 12 12:34:58 MST 2020

What does bearing clearance have to do with oil leaks? You must have some very precise holes in your transmission that allows only synthetic oil to escape. I am not buying that theory.Gary 

-----Original Message-----
From: gradea1 <gradea1 at charter.net>
To: 'warthodson at aol.com' <warthodson at aol.com>
Sent: Sun, Jan 12, 2020 12:19 pm
Subject: Re: [Healeys] Does synthetic oil leak more?

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:"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. Synthetic oils, 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." See illustration attached- Hank

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