Buying a used car is exciting, and knowing what’s covered after you drive off the lot makes that excitement easier to enjoy. AutoSavvy, CarMax and Carvana are three of the biggest names in used car retail, and each one backs its vehicles with a warranty. We break down what each warranty actually covers, how long it lasts and what you need to know before you sign. Why Used Car Warranty Terms Are an Important Part of the Purchase A warranty matter…