If someone could make a truck get 30% better fuel efficiency they would do so, not because gov mandates it but because they would make a fortune, every trucking comp there is would buy their product. That is the beauty of capitalism.
Apparently, you missed this earlier in the thread:
"Combination tractors will be required to achieve up to approximately 20% reduction in fuel consumption and greenhouse gas emissions by model year 2018."
"Under the new rules from the Environmental Protection Agency and the National Highway Traffic Safety Administration, trucks and buses built in 2014 through 2018 will reduce oil consumption by a projected 530 million barrels and greenhouse gas (GHG) pollution by approximately 270 million metric tons.
This program, which relies heavily on off-the-shelf technologies, was developed in coordination with truck and engine manufacturers, fleet owners, the state of California, environmental groups and other stakeholders. "
"This regulation and the process used to establish it are a model for how government and business should work together to meet energy, environment and economic goals." Tim Solso, chairman and CEO of
Cummins.
"With this rule, EPA and NHTSA have now set an example for what could be a worldwide GHG and fuel efficiency regulation for heavy duty trucks and engines." Daniel C. Ustian,
Navistar chairman, president and CEO.
"We support the new federal regulations on greenhouse gas emissions and fuel efficiency as they affect the commercial vehicles industry. We have worked closely and productively with the EPA and NHTSA and look forward to continued collaboration on implementation of the new standards." Sean Waters, Director Compliance and Regulatory Affairs,
Daimler Trucks North America
"This is an important milestone for our industry and our country. We are pleased to be part of a realistic solution that will ultimately help reduce greenhouse gas emissions and conserve natural resources by helping to increase the fuel efficiency of our industry." Douglas W. Stotlar, president and CEO of
Con-way Inc.
"Commercial vehicles account for approximately 20 percent of transportation's fuel use, so fuel efficiency standards are essential to spur affordable and widely available cleaner delivery vehicles." Frederick W. Smith, president, CEO and chairman of
FedEx Corp."