1994 Cadillac Eldorado Owner's Manual - Page 212

Run your engine only as long as you must. This saves fuel. When you the engine, makeit go alittle faster than just idle. That is, pushthe accelerator slightly. This uses less for the heat that you get and it fuel to keeps the battery charged.You will need a well-charged battery restart the vehicle, and possibly for signaling on with your headlights. later Let the heater run for awhile. Then, shutthe engine off and closethe window almost allthe way to preserve the heat. Start the engine again and repeat this only when you feel really uncomfortable from cold. But do as little as possible. the it Preserve the fuel as long as can. To help keep warm, you can get out you of the vehicle and do some fairly vigorous exercises every halfor so hour until help comes. 200