There will be no end to this discussion. I thought a lot to share some facts (vendor reports,FCA responsible people remarks) but then decided against it as it will be unfair. But be rest assured High speed driving is possible for long stretches only in night since we do not have night vision speed camera so popular.With no offence My total driving on diesel with different systems is much much more than what you mentioned (leave aside petrol) and there are phenomena which you might not have experienced by now but will surely experience only in FUEL Injection system and turbo during your coming periods. Since you are an keen observer you will be able to gauge what I am talking is not in air but seen,experienced and have then jotted down .There are several situations where the earlier VW engine so called old tech won't hesitate but MJD will give up.My appetite for high speed driving has gone down with age and responsibility towards family otherwise I could show you some bery fine details. I accept all your comments in positive note and please let the thread be on its track for what it was meant to be.