There is a weight impact. Typically for a consumer we hear the weight and the payload issue is much bigger on trucks, of course, where volume and payload matters to them. One of things we find too in the more evolved markets, like in Europe, is that the OEMs will have a gasoline tank on there but they'll engineer it down to be a very small gasoline tank. That helps offset the weight you're adding with a natural gas fuel system. Right now in North America we're just sort of having both the normal size. However, I'm not sure if it's the GM pickup or Chrysler, but I believe one of them is going to scale down the gasoline tank.
On May 17th, 2012. See this statement in context.