I'll always offer help to anyone if they seem in need of assistance, whether or not car related. And usually the offer is declined but with a kind word of thanks for the offer.
Sometimes, though, you get a gob full of abuse for offering assistance.
Which, I find to be bloody rude. So I'm considering adopting the **** you I'm all right Jack attitude. If the younger generation (ie ME at 3
is considered to be devoid of manners then I'll disabuse myself of manners and treat everyone with similar contempt to match those with which I 've been approached.