Cadillac XT4 Owner Manual (GMNA-Localizing-Europe-15440913) - 2022 -
CRC - 5/13/21
DRIVING AND OPERATING
263
Use the recommended fuel for proper
vehicle maintenance. Use unleaded
petrol with a posted octane rating of
95 RON or higher and with ethanol up
to 10% by volume. Unleaded petrol
rated at 91 RON can be used, but
acceleration and fuel economy will be
reduced, and an audible knocking
noise may be heard. If this occurs, use
petrol rated at 95 RON as soon as
possible. If heavy knocking is heard
when using unleaded petrol rated at
95 RON, the engine needs service.
Prohibited Fuels (Petrol)
Caution
Do not use fuels with any of the
following conditions; doing so may
damage the vehicle and void its
warranty:
(Continued)
Caution (Continued)
.
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
fuel economy and performance,
and may decrease the life of the
emissions catalyst.
Fuel Additives (Diesel)
GM recommends the use of ACDelco
Diesel Fuel conditioner. This will help
maintain optimal engine performance.
GM does not recommend other
aftermarket diesel additives.
In the event you refuel using
low-quality diesel, GM recommends
adding ACDelco Fuel System
Treatment Plus-Diesel to the vehicle's
fuel tank. ACDelco Fuel System
Treatment Plus-Diesel can help clean
engine deposits and is available at
your GM dealership.
Fuel Additives (Petrol)
TOP TIER Detergent Gasoline is highly
recommended for use with your
vehicle. If your country does not have
TOP TIER Detergent Petrol, add
ACDelco Fuel System Treatment
Plus-Petrol to the vehicle's petrol fuel
tank at every oil change or 15 000 km
(9,000 mi), whichever occurs first. TOP
TIER Detergent Petrol and ACDelco
Fuel System Treatment Plus-Petrol
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 retailer for the
GM-approved additive available in
your country.