At 02:01 PM 11/18/98 -0800, you wrote:

>Also, it use to be that you are not suppose to use synethics until the
engine is broken in.  This is because synthetics do not have the same seal
swelling properties as natural paraffin base oil which helps to set the
seal in for new engines. I don't know if that is still true.. one the safe
side, I would not use synethics in a new car until after 10K miles or so.
>
>Yau-Man Chan

The problem with using synthetic oils in a new/rebuilt engine is that the
stuff works *too* well - the engine just won't break in!  (however, some
vehicles made in the last coupla years are built to such close tolerances
that they are 'broken in' from the git go, and come with synthetic
installed as new).

Austin