Miricle oil additive?

[Kneale Brownson]

PO indicated my 200q20v grew up on Castrol dino oils to the ripe old age of
140K by the time I acquired it.  I've kept up that practice for another 90k
miles so far.  I change oil/filter at "about" 4k.  I don't really see any
reason to pay for synthetics to be used in equipment designed before there
were synthetics.

I use dino Rotella in my diesel tractors.

At 07:48 PM 6/1/2005 -0600, Ed Kellock wrote:
>I use the Rotella non-synth in my V8's.  I also used the synth one
>winter.  Can't tell much in such a short time though.  This was
>partially a result of my dad using 15W40 in the Mercedes that we had
>back in the mid 70's.  He went with the diesel grade oil because we
>lived in the desert and he wanted the extra vicosity.  That car ended
>up with over 200k on it 20 years later.