When to switch to Synthetic?

["David M. Hall" <dhall@hp-vcd.vcd.hp.com>]

OK, so the MG content is low...

I've just got a new Ford Ranger.  I want to run synthetic in it, but I know
that I need to break in the engine..  How many miles before I should break in?
I'm figuring 9K (3 standard oil changes...)

For the MG Content, I guess the same issue would apply to a freshly rebuilt MG
engine!  I've been running Casteroil Syntec 5/50 for a while now, and am VERY 
pleased
with it.  72 MGB/GT.

Thanks!

Dave Hall
dhall@vcd.hp.com

dhall@vcd.hp.com