Fuel; Fuel Additives - Cadillac 2015 SRX Owner's Manual

Fuel

Use the recommended fuel for
proper vehicle maintenance.
Use regular unleaded petrol with a
posted octane rating of 95 RON or
higher, otherwise an audible
knocking noise may be heard.
If heavy knocking is heard when
using petrol rated at 95 RON or
higher, the engine needs service.
Use of Seasonal Fuels
Use summer and winter fuels in the
appropriate season. The fuels
industry automatically modifies the
fuel for the appropriate season.
If fuel is left in the vehicle tank for
long periods of time, driving or
starting could be affected. Drive the
vehicle until the fuel is at one-half
tank or less, then refuel with the
current seasonal fuel.
Prohibited Fuels
Petrol containing oxygenates such
as ethers and ethanol, as well as
reformulated petrol, is available in
some cities. If these petrols comply
with the previously described
specification, then they are
acceptable to use. However, E85
(85% ethanol) and other fuels
containing more than 15% ethanol
must be used only in FlexFuel
vehicles.
Caution
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 petrol, mainly high octane
racing petrol, can contain an
octane-enhancing additive called
methylcyclopentadienyl manganese
tricarbonyl (MMT). Do not use petrol
and/or fuel additives with MMT as
they can reduce spark plug life and
affect emission control system
Driving and Operating
performance. The malfunction
indicator lamp may turn on. If this
occurs, see your dealer for 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, add Fuel System
Treatment PLUS to the fuel tank at
every engine oil change or every
15,000 km, whichever occurs first.
It is available at your dealer.
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