Assemblyman Bob Oaks (R-C Macedon) checks out a prototype hydrogen fuel-cell vehicle -- which he later got to drive -- on display outside the Capitol earlier this month. Four different car companies demonstrated their vehicles. The companies are seeking $50 million in state aid to help develop the hydrogen fueling infrastructure during the next five years in New York State to go along with $165 million of federal support To help further develop the technology and hopefully start manufacturing in New York State. General Motors' fuel cell research is being done at their Honeoye Falls facility south of Rochester. Advocates say engines powered by hydrogen fuel-cells are twice as efficient as those powered by gasoline.