1996 Mercury Sable Owner's Manual - Page 351

Emission Control System Your vehicle is equipped with a catalytic converter which enables your vehicle to comply with applicable exhaust emissions requirements. RWARNING It is important for your safety and the efficient operation of your vehicle that the engine and exhaust system operate properly. Exhaust leaks may result in the entry of harmful and potentially lethal fumes, particularly carbon monoxide, into the passenger compartment. In addition, malfunctions in the engine or exhaust system can result in excessive exhaust system temperatures. Under extreme conditions (for example, towing a trailer up a steep hill on a very hot day with a malfunctioning engine or exhaust system), excessive exhaust temperatures could damage the fuel system, the interior floor covering, or other vehicle components, possibly causing a fire and resulting in personal injury. To make sure that the catalytic converter and the other emissions control parts continue to work properly: u Use only unleaded fuel. u Avoid running out of fuel. u Do not turn off the ignition while your 324 vehicle is moving, especially at high speeds.