GMC Acadia 2025 - Filling the Tank; Fuel Additives; Fuels in Foreign Countries; Prohibited Fuels

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-18281917) - 2025
250 Driving and Operating
Recommended Fuel
Regular unleaded gasoline meeting ASTM
sp
ecification D4814 with a posted octane rating
(R+M)/2 of 87 or greater is recommended.
Do not use gasoline with aposted octane
rating of less than 87, as this will result in
reduced performance and driveability. If heavy
knocking is heard when using gasoline rated at
87 or greater, the engine needs service.
Do not use any fuel labeled E85 or FlexFuel.
Do not use gasoline with ethanol levels greater
than 15% by volume.
Prohibited Fuels
Caution
Do not use fuels with any of the following
co
nditions; doing so may damage the
vehicle and void its warranty:
(Continued)
Caution (Continued)
•
Fo
r vehicles that are not FlexFuel,
fuel labeled greater than 15%
ethanol by volume, such as mid-level
ethanol blends (16–50% ethanol), E85,
or FlexFuel.
•
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.
Fuels in Foreign Countries
Th
e U.S., Canada, and Mexico post fuel octane
ratings in anti-knock index (AKI). For fuel not to
use in aforeign country, see Prohibited Fuels
3250.
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.
Filling the Tank
An arrow on the fuel gauge indicates which side
of the vehicle the fuel door is on. See Fuel Gauge
3101.