In traffic light grand prix of days of old, if I switched the air con off, the missus knew it was time to hold on , and then the rollocking would start from her mouth..
In modern day cars though I think they are much more efficient...BUT...id still turn it off as surely its making the engine work harder at least
In modern day cars though I think they are much more efficient...BUT...id still turn it off as surely its making the engine work harder at least