RESTON, Va. -- A new survey by Harris Interactive into which factors most influence RV purchase decisions shows that messages focusing on family togetherness and cost savings now resonate equally with potential RV buyers. The survey also revealed positive attitudes about health and wellness benefits of RVing, which may help persuade non-owners to buy.

CHICAGO -- Following a complaint by Navistar about a flawed certification process, the U.S. Environmental Protection Agency revised its guidelines for companies to comply with tougher emissions standards on diesel engines, Dow Jones is reporting.