Subaru WRX & WRX STI Manuals 2015 WRX & WRX STI Owner's Manual | Page 380

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 closed while
driving to prevent exhaust gas
from entering the vehicle.

Catalytic converter

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 exhaust system for a short time after the
engine has been shut off. This sound is
normal.

STI

8-3

reduce HC, CO and NOx in exhaust
gases, thus providing cleaner exhaust.
To avoid damage to the catalytic converter:
. Use only unleaded fuel. Even a small
amount of leaded fuel 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 dealer.
. Do not apply undercoating or rust
prevention treatment to the heat shield of
catalytic converter and the exhaust system.
. Do not drive with an extremely low fuel
level.

WARNING

Except STI

The catalytic converter is installed in the
exhaust system. It serves as a catalyst to

. 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
– CONTINUED –