Recommended Fuel; Prohibited Fuels; Fuels In Foreign Countries; Fuel Additives - GMC Savana 2020 Owner's Manual

Recommended Fuel

For diesel engine vehicles, see
Fuel for Diesel Engines in the
Duramax diesel supplement.
If the vehicle has a yellow fuel cap
or a yellow sticker on the fuel door,
E85 or FlexFuel can be used. If the
vehicle does not have a yellow fuel
cap or yellow sticker, do not use
gasoline with ethanol levels greater
than 15% by volume. See E85 or
FlexFuel 0 194.
Use regular unleaded gasoline
meeting ASTM specification D4814
with a posted octane rating of 87
(R+M)/2 or higher. Do not use
gasoline with a posted octane rating
of less than 87, as this may cause
engine knock and will lower fuel
economy.

Prohibited Fuels

Caution
Do not use fuels with any of the
following conditions; doing so
may damage the vehicle and void
its warranty:
For 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
(Continued)
Driving and Operating
Caution (Continued)
(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
The 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 0 193.

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
193