Umm make a car that runs on water produces 550 hp and 620 lb/ft of tourque, make it so 1 litre will run you like 20 miles and the only bi-product from the burning of the fuel would be steam. And give it some really impressive numbers like a sub 5 second 0-60 and a 10 second 1/4 man that would be cool if cars like that were made I would really want one, ohh and for advertising just make it flashy and have a half naked chick modeling with the car to give it a real feel
