Boy that's an easy question! In the mid eighties a dude named Tom Ogle outta El Paso built a +100mpg vapor fuel system and put on something like a 72' thunderbird later I think it ended up on a 79' galaxy for testing. The oil companies all tried to buy him out but he refused and not to long later, even after survivng 1 assassination attempt outside a bar, he was found dead by the side of the road from drug overdose. The car disappeared snatched up most likely by shell oil n backroom deals. Never to see the light of day again. The oil Co's nightmare car that's my dream-mobile