Cadillac CTS 2014 Owner's Manual page 301

Cadillac CTS Owner Manual (GMNA-Localizing-MidEast-6882317) - 2014 -
CRC - 9/19/13
If the vehicle has the 2.0L L4 turbo
engine, use premium unleaded
gasoline with a posted octane rating
of 95 RON or higher. You can use
regular unleaded gasoline rated at
91 RON or higher, but the vehicle's
acceleration could be slightly
reduced and a slight audible
knocking noise, commonly referred
to as spark knock, might be heard.
If the octane is less than 91 RON, a
heavy knocking noise might be
heard when driving. If this occurs,
use a gasoline rated at 91 RON or
higher as soon as possible.
Otherwie, you could damage the
engine. If heavy knocking is heard
when using gasoline rated at 91
RON or higher, the engine needs
service.
Use of Seasonal Fuels
Use summer and winter fuels in the
appropriate season. Driving or
starting could be affected if the
incorrect fuel is used. Drive the
vehicle with the engine running until
the fuel is a half tank or less, then
refuel with the current seasonal fuel.
Prohibited Fuels
Gasolines containing oxygenates,
such as ethers and ethanol, as well
as reformulated gasolines are
available in some cities. If these
gasolines 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
flex fuel vehicles.
Black plate (77,1)
Driving and Operating
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 gasolines that are not
reformulated for low emissions can
contain an octane-enhancing
additive called
methylcyclopentadienyl manganese
tricarbonyl (MMT). Do not use
gasolines with MMT as they can
reduce spark plug life and affect
emission control system
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