Is there an environmental or financial reason for having stop/start on a car?

Is there a good environmental and/or financial reason for having stop/start on a car, either petrol or diesel powered?

Does the start/stop mechanism and premium fuel effect the regeneration process?

I stumbled across a couple of issues which seem to do the rounds on various forums, so I thought I'd ask here for a definite answer. One is that the Start-Stop mechanism, as implemented in the Audi A6...

Does my Ford Ka have stop/start?

I've just brought a 13 reg Ford Ka 1.2. Can you tell me if this particular model has stop/start?

What is the real mpg for a KIA Cerato used as a taxi?

I'm buying a 2006 petrol KIA Cerato 1.6. Can you let me know the mpg on all local stop and start driving as it will be a taxi?

Why won't the stop-start on my Smart Fourtwo work?

I am being told by Smart that the stop-start on my Smart Fourtwo will not work when the external temperature is outside of a suitable range. Today the extenal temperature is 9C, and it still won't operate....

Why is the starter turning over when the battery is connected?

I have an issue with my Audi A4 2.5. I have replaced the EGR valve and the oil breather filter just below the EGR valve. I put it all back together and all was good but after a short drive I heard quite...

Renault Megane stop/start problems - cause?

I regularly follow your Q&A page and was wondering if you could help me. I have a 2013 Renault Megane 1.5 DCI Coupe with Stop/Start and recently the system has failed to operate and I get the error "Check...

Stop start technology - what are the mechanical long term effects?

What are your views on the mechanical long term effects of stop start technology ? Not with standing modern engine oils being better, and environmental benefits ( at least on paper ) surely constant stop...

Potential turbocharger and stop-start conflict

My FIAT 500 TwinAir is the third car I have owned with a turbocharger and the first with a stop-start system which is on by default. When stopping after a long fast run (e.g. a queue at a motorway exit...

Vauxhall Insignia stop-start problem

I have just bought Vauxhall Insignia, but the stop start system doesn't shut off the engine when stationary in traffic. Is this a fault?