A large vehicle driven conservatively can better the fuel economy of a small car driven aggressively? For example: A Ford Falcon and a Mazda Astina?

And overall, who do you believe is more inclined to drive to conserve fuel when prices are high?

Your driving habits affect you fuel consumption quite a bit. Properly inflated tires, no hard braking or fast acceleration can lead to a much higher mpg no matter what vehicle you are driving. Of course this can only go so far as the vehicle will allow. As far as who is more inclined to conserve fuel when prices are high I believe it is the people least able to afford the fuel.

smaller cars driven slowly would be alot better

the person with not thta much money would conserve.