I think much of this has been discussed in the past, already, but here is
my 2c-worth:
If I recall postings correctly, very early synthetics did not have the
chemicals that expand the seals, causing increased leakage on older cars.
They do now, so leakage is not a problem (well no more than dino oils).
I have heard some pretty stupid remarks about synthetics, including (from
the PO of my car): 'synthetics can leak though the metal block'. Yeah,
right, through the metal!
I use Redline 20/50 in my A's engine and I don't think leakage is
significantly higher than with dino oil. Most of the oil is coming out of
the timing cover which is a known problem on A engines (must get a timing
cover off an early B to fix this).
I use Redline MTL in my gearbox with excellent results. Gear changes are
excellent at all temperatures. MTL and MT-90 include the friction modifiers
to ensure that the synchromesh does its job but don't include the chemicals
that destroy brass syncros (found in gear oils). No leakage of oil from the
gearbox.
I have recently spoken to someone who is using Redline oil in his overdrive
and is very pleased with the results. He says shifting into and out of
overdrive is almost instantaneous.
So, those of you who say 'I would never use synthetic oils' unless you have
some recent facts of experience, think again!
Finally, I would advise caution to ensure you have the right synthetic oil
for the appropriate application. For example, don't use straight synthetic
engine
oil in the gearbox, use one which is formulated for gearboxes.
Simon
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Simon Matthews MailTo:simon_matthews@avanticorp.com
'57 MGA
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