Yes, but diesels already idle much more efficiently than gasoline
engines.  It's not particularly good for them to idle for prolonged
periods, but at idle speed they do consume relatively little fuel.

Allan

On Nov 25, 2007, at 4:50 PM, Gregory Smith wrote:

> Years ago, I read an article about a test VW did in Holland (I
> think it
> was) where they fit some Golfs with Diesel engines that would
> automatically shut off at idle and automatically restart when
> needed.  The
> finding was that they were off about half the time.  This could
> save some
> emissions over time for sure.