Fuel Additives; Filling The Tank - Cadillac CTS 2013 Owner's Manual

9-44 Driving and Operating
If the vehicle has the 6.2L V8 engine
(VIN Code P), use premium
unleaded petrol with a posted
octane rating or RON of 98 or
higher. In an emergency, you can
use regular unleaded petrol with an
octane rating or RON of 95 or
higher. If 95 RON fuel is used, do
not perform any aggressive driving
manoeuvres such as wide open
throttle applications. You might also
hear audible spark knock during
acceleration. Refill the tank with
premium fuel as soon as possible to
avoid damaging the engine. If heavy
knocking is heard when using petrol
rated at 98 RON or higher, the
engine needs service.

Fuel Additives

Petrol should contain detergent
additives that help prevent engine
and fuel system deposits from
forming. Clean fuel injectors and
intake valves will allow the emission
control system to work properly.
Some petrol does not contain
sufficient quantities of additive to
keep fuel injectors and intake valves
clean. To make up for this lack of
detergency, it is recommended that
GM Fuel System Treatment PLUS
(GM Part No. 88861011) be added
to the fuel tank at every engine oil
change or every 15 000 km,
whichever occurs first.
Petrols containing oxygenates, such
as ethers and ethanol, may be
available in your area. However,
fuels containing more than 15%
ethanol, such as E85 (85% ethanol),
or more than 15% MTBE (an ether)
should not be used in vehicles that
were not designed for those fuels.
See Recommended Fluids and
Lubricants on page 11 5 for more
information.
Notice: This vehicle was not
designed for fuel that contains
methanol. Do not use fuel
containing methanol. It can
corrode metal parts in the fuel
system and also damage plastic
and rubber parts. That damage
would not be covered under the
vehicle warranty.
Some petrols can contain an
octane-enhancing additive called
methylcyclopentadienyl manganese
tricarbonyl (MMT); ask the attendant
where you buy petrol whether the
fuel contains MMT. We recommend
against the use of such petrols.
Fuels containing MMT can reduce
spark plug life and affect emission
control system performance. The
malfunction indicator lamp might
turn on. If this occurs, return to your
dealer for service.

Filling the Tank

WARNING
Fuel vapours and fuel fires burn
violently and can cause injury or
death.
To help avoid injuries to you
and others, read and follow
all the instructions on the fuel
pump island.
(Continued)