Bob:
There is a fear that, especially with older engines, a synthetic oil (which
does a better job preventing wear in an engine than regular engine oil)
does not allow the rings to seat properly during break-in. Although new
Porsches and Corvettes etc come with synthetic oil from the factory and
today's synthetics are much more well-rounded than the early versions, I
tend to run a rebuilt engine for the initial 500 miles with regular oil,
change the oil and filter, run it about another 3K miles on regular oil
before going to synthetics for the rest of its life. Other people do it
differently. I think break-in is more important in the initial 1K miles
than the 5K range, but do what you feel comfortable with in your
car....regular mineral-based oil in the proper viscosity will do the job
with regular changes and synthetics basically just give you an extra
measure of protection.
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Date: Wed, 27 Feb 2002 20:51:57 -0500
From: "rmf3860@erols.com" <rmf3860@erols.com>
Subject: Break-in oil
Williams' book recommends mineral oil for initial break in of a new engine.
For those with the book, is he suggesting mineral oil for each of the oil
changes through 6,000 miles? (see page 94). I really don't think it's clear.,
What have other members used for initial break-in of their rebuilt engines?
I'm planning ahead; I should have my engine back from the machine shop in a
week or so.
Thanks
Bob Fabie
'75 TR6
William Whitmoyer
69 TR6
90 BMW iX
91 CRX Si
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