Lobbyists tout fuel economy during visit to Mansfield.

MANSFIELD -- The three young men in the shiny silver SUV tooling around Central Park Wednesday afternoon were on a road trip. But this trio didn't include ballparks or beaches. They were part of the Natural Resources Defense Council Action Fund's "Drive Beyond Oil Tour." It's a campaign to rally public support for higher fuel economy standards as the House prepares to vote on an energy bill by the end of the week. The Senate passed an energy bill June 21 that includes a 35 mpg standard by 2020.