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 Message Thank you! Oops! Related Content Managing the Risk of Outliving Your Money Steps to help you sustain and grow your retirement savings. Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit. Choosing a Retirement Plan that Fits Your Business To choose a plan, it’s important to ask yourself four key questions.