On Sun, 24 Sep 2006 00:29:06 GMT, John Horner <jthorner@yahoo.com>
wrote:
>The oil condition is not sensed directly. The engine computer monitors
>total revolutions, temperatures and other factors to arrive at an aging
>curve for the oil. It is much more sophisticated then the old xxx
>miles/yyy months way of doing things.
>
>GM of all companies has been a leader in this kind of technology, but
>many of the Germans and now Honda are also taking up this methodology.

haven't aircraft engines been done like this forever?

it occurs to me that hybrid cars might need to do this, too, since the
internal combustion engine might not even be going, for some
significant number of miles / hours.

J.