If you're in the market for a new car, or a new-to-you car, it really pays to do your homework before you walk on a car dealership's lot.<br />According to Business Insider, if you secure your financing before you go car shopping, you can save thousands over the course of the loan.<br />That's because when dealers 'run the numbers' to find lenders willing to loan you the money, they're not required to offer you the lowest rate they find.<br />Not only that, they're allowed to add up to 2% to the loan rate as a type of convenience fee!<br />Your best bet is to call your local credit unions and banks to see what rates you qualify for, and how much they'll be willing to loan you.