1. A method of displaying a vehicle's information, comprising: measuring via a computing device a set of diagnostic and state values of the vehicle; comparing via a processor of the computing device the set of measured values with a set of related normal values, the normal values being within a preset range for operation of the vehicle; displaying on a display a video image having a graphical depiction of the measured set of values in comparison to the related normal set of values, with the related set of normal values being predetermined and displayed at a certain region of the video image, and the set of measured values being displayed on the video image in relation to the certain region of the normal values; indicating varying levels of relative health of the vehicle according the placement of an icon relative to areas of the graphical depiction of the measured set of values; and wherein the video image is a plurality of concentric circles, with measured values of the vehicle being located closer to center as the measured values are closer to the values of the related normal set of values.