RE: Oil change interval for synthetic oil

["Randall" <tr3driver@comcast.net>]

> As I recall, when Mobil 1 was first sold, changing the oil was
> not required,
> just a filter replacement at some mileage interval and toping off the
> oil level.

And there was a test where they loaded Mobil 1 into a new fleet of taxis and
followed the recommended service intervals.  The test was discontinued at
40,000 miles due to excess oil consumption ...

Randall