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Old 19-01-2008, 01:53 PM   #1
jw.
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Synthetic oil

The merits of synthetic v mineral oil is being disucussed on a forum and I've just read this:

As an old dragracer, we used the synthetics extensively, for everything. In fact Amsoil was/is widely used.

Our problem was drain-off, or cling. When the engines sat for any length of time, parts would end up completely dry. The bottom of the intakes would dry to the point of rust, as would rods, cyl walls, etc. So those of who didn't run weekly switched back to dino-oil, in light weights.

So, my view is that synthetic has big benefits for the folks who run almost everyday, and drawbacks for those who don't.

Randy


Can anyone shed light on this?
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Old 19-01-2008, 03:23 PM   #2
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I can't answer the question - but is magnatec synthetic? I seem to remember you making a post a long time ago about the "clinginess" of magnatec.
This chap might be able to assist you answering:
http://www.pistonheads.com/gassing/t...p?h=0&t=237642
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Old 19-01-2008, 04:13 PM   #3
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Quote:
Originally Posted by Matt View Post
I can't answer the question - but is magnatec synthetic? I seem to remember you making a post a long time ago about the "clinginess" of magnatec.
Magnatec is mineral and, by today's standards, pretty low tech but I still believe it to do what it says on the tin.

I had a look at your link and I'll maybe follow it up if necessary.
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Old 19-01-2008, 09:52 PM   #4
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FWIW, the best racing oil for a four stroke is the old fasioned mineral oil, changed after every race.
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