There really is a price war between oil and gas for vehicles, especially heavy large ones. What will your car drive on: electricity, natural gas, biofuel, petroleum gas? What mix? Electric is probably going to be the longer term winner, but gas and methane distillates would depress energy prices and create price wars.
http://www.google.com/hostednews/ap/article/ALeqM5goxD4AoI5_sW0Vwz971pZGqynOZQ?docId=ec7fc2b4fcd74608aed55f54f3271fa7
