Six Completely Outrageous Automaker ClaimsJohn Krewson8/14/09 2:45pm1341EditInvite manuallyPromoteDismissUndismissHideSo GM says the Chevy Volt will be getting 230 MPG... somehow. Outrageous, right? But not exactly unique. Every now and then, automakers come out with something that's just too good to be true. Here's seven of their biggest whoppers.