Mobil 1

[Stephen Bigelow]

>         While I'm here I might as well ask.  How is this possible?  Oils
> break down after a certain amount of wear and tear.  25000 miles is a long
> way, almost a years worth of driving on my cars, and my oils need changing
> after 5000 km which is more then 7 oil changes of my oils to 1 oil change
of
> this miracle elixer.

How do you know when your oil needs changing? Are you getting it tested?