Synthetic oils

["Hernando R. Cuenca x1390" <HERNANDOC@mdli.com>]

I heard somewhere (maybe here?) that the use of synthetic oils in older
cars, my '73 TR6 in particular, may lead to some damage.  I remember
some discussion that the new synthetics could "eat" rubber seals.  Of
course I saw this after I had changed to synthetics.  Should I go back
to regular oil? Is there any consensus on this topic?  Any and all
comments would be appreciated.  Thanks in advance!

-HC