hmmm, very very interesting
but i doubt using an old car is better than making and using a newer one... altho, when i said "fuel efficent" i ddnt mean newer ones, i just meant cars tht rnt manufactured in the US :P cuz cmon, we all know US cars consume the most amount of fuel on the planet :P but the way their fuel prices are going, they better do sumthing abt tht efficency :P
ow and fang, if u do get ur hands on tht study, cud u please post a link or sum details about it? i'd love to read on how they prove their point... cuz u see, even if energy is wasted in making newer cars, imagine how much is wsated when the old car engine cant combust the petrol to its fullest. not only does it waste KJs of energy per second, it also sends the unburnt hydrocarbons namely CO, CO2 and NO2 into the air which we then breathe in thru our mouths and noses...