Subaru Outback Manuals 2010 Outback Owner's Manual | Page 290

8-4 Driving tips 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, backfiring or incomplete combustion), have your vehicle checked and repaired by an authorized SUBARU deal W"