Recommended Fuel; Prohibited Fuels; Fuel Additives - Cadillac CT4 Owner's Manual

Cadillac CT4 Owner Manual (GMNA-Localizing-MidEast-15283644) - 2022 -
CRC - 7/28/21
276 DRIVING AND OPERATING

Recommended Fuel

Unleaded petrol with a posted octane
rating of 95 RON or greater and with
ethanol up to 10% by volume is
recommended. If unavailable,
unleaded petrol rated at 91 RON can
be used, but will result in reduced
performance and driveability, and an
audible knocking noise may be heard.
Once available, 95 RON petrol or
greater should continue to be used.
If heavy knocking is heard when using
unleaded petrol rated at 95 RON or
greater, the engine needs service.

Prohibited Fuels

Caution
Do not use fuels with any of the
following conditions; doing so may
damage the vehicle and void its
warranty:
Fuel with any amount of
methanol, methylal, ferrocene,
and aniline. These fuels can
corrode metal fuel system parts
or damage plastic and rubber
parts.
Fuel containing metals such as
methylcyclopentadienyl
manganese tricarbonyl (MMT),
which can damage the emissions
control system and spark plugs.
Fuel with a posted octane rating
of less than the recommended
fuel. Using this fuel will lower
Caution (Continued)
fuel economy and performance,
and may decrease the life of the
emissions catalyst.

Fuel Additives

TOP TIER Detergent Gasoline is highly
recommended for use with your
vehicle. If your country does not have
TOP TIER Detergent Gasoline, add
ACDelco Fuel System Treatment
Plus-Gasoline to the vehicle s gasoline
fuel tank at every oil change or
15 000 km (9,000 mi), whichever
occurs first. TOP TIER Detergent
Gasoline and ACDelco Fuel System
Treatment Plus-Gasoline will help
keep your vehicle s engine fuel deposit
free and performing optimally. If you
are unable to obtain ACDelco Fuel
System Treatment Plus - Gasoline,
consult your dealer for the GM
approved additive available in your
country.