I have a 2003 Stilo JCB, and on journeys I'm getting arount 25Km / Litre.
This has been known to go to 28 Km / Litre at times. However most of my fuel is used looking for parking (15Km / Litre)

Being extremely old, I very rarely go over 100 K/Hour, and I consciously monitor driving conditions. But before I'm judged, the above statement is governed by road conditions...

Just how reliable is the on-board computer..

Mike...