John Horner 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.

Has anyone had the used oil tested to see how consistent the oil change
indicator is?