Forbes compiled a list of luxury cars with the lowest operating costs. The Lexus hybrid, RX 400h, came in first with a 5-year estimated operating cost of just $12,091. The car costs $41,895 which is much higher than many cars on the list, including the operating costs. Anyone find it odd they are compiling a list of cost savings on a luxury car? If you are a buying a luxury car, do you really care about operating cost?