Interested in a Fuel Efficient Car? Estimate how many months it may take to recover the out-of-pocket costs when buying a more efficient vehicle. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Content What Smart Investors Know Savvy investors take the time to separate emotion from fact. The Utility of Sector Investing Successful sector investing is dependent upon an accurate analysis about when to rotate in and out. Should I Buy or Lease an Auto? This calculator compares the financial impact of leasing versus buying an automobile.