Subaru Outback Manuals 2018 Outback Owner's Manual | Page 351

Driving tips/Catalytic converter exhaust fumes are entering the vehicle, have the problem checked and corrected as soon as possible. If you must drive under these conditions, drive only with all windows fully open. . Keep the trunk lid (Legacy) or rear gate (Outback) closed while driv- ing to prevent exhaust gas from entering the vehicle. NOTE Due to the expansion and contraction of the metals used in the manufacture of the exhaust system, you may hear a crackling sound coming from the ex- haust system for a short time after the engine has been shut off. This sound is normal. 8-3 Catalytic converter S08AD WARNING . Avoid fire hazards. Do not drive or park the vehicle anywhere near flammable materials (e.g. grass, paper, rags or leaves), because the catalytic converter operates at very high tempera- tures. . Keep everyone and flammable materials away from the exhaust pipe while the engine is running. The exhaust gas is very hot. 2.5 L models 3.6 L models The catalytic converter is installed in the exhaust system. It serves as catalyst to reduce HC, CO and NOx in exhaust gases, thus providing cleaner exhaust. To avoid damage to the catalytic converter: . Use only unleaded gasoline. Even a small amount of leaded gasoline will damage the catalytic converter. . Never start the engine by pushing or pulling the vehicle. . Avoid racing the engine. . Never turn off the ignition switch while the vehicle is moving. . Keep your engine tuned-up. If you feel the engine running rough (misfiring, back- firing or incomplete combustion), have your vehicle checked and repaired by an – CONTINUED –