I hate to break it to you but the current record for hydrogen powered cars is over 5000km/litre and for combustion engines it's over 1200km/litre. The auto ind

I hate to break it to you but the current record for hydrogen powered cars is over 5000km/litre and for combustion engines it's over 1200km/litre. The auto industry has some of the best engineers in the world and are more than capable of offering high efficiency vehicles but it's not in their best interests to do so. Frequent vehicle replacements and high energy consumption are in the industies favour. http://www.canadiandriver.com/thenews/2008/04/13/fuel-economy-record-broken-at-shell-eco-marathon.htm http://www.canadiandriver.com/thenews/2008/04/13/fuel-econom... http://www.uni-protokolle.de/nachrichten/id/102185/ http://www.uni-protokolle.de/nachrichten/id/102185/