octane BUICK REGAL 2020 Owners Manual

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada-13557849) -
2020 - CRC - 6/25/19
Driving and Operating 217
Fuel
Top Tier Fuel
GM recommends the use of TOP
TIER Detergent Gasoline to keep
the engine clean, reduce engine
deposits, and maintain optimal
vehicle performance. Look for the
TOP TIER Logo or see
www.toptiergas.com for a list of TOP
TIER Detergent Gasoline marketers
and applicable countries.
Recommended Fuel (2.0L
Turbo Engine)
Premium unleaded gasoline
meeting ASTM specification D4814
with a posted octane rating of 93—
(R+M)/2 —is highly recommended
for best performance and fuel
economy. Unleaded gasoline with
an octane rated as low as 87 can be
used. Using unleaded gasoline
rated below 93 octane, however, will
lead to reduced acceleration and
fuel economy. If knocking occurs,
use a gasoline rated at 93 octane
as soon as possible, otherwise, the
engine could be damaged. If heavy
knocking is heard when using
gasoline with a 93 octane rating, 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.
Recommended Fuel (3.6L
Engine)
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.
Do not use any fuel labeled E85 or
FlexFuel. Do not use gasoline with
ethanol levels greater than 15% by
volume.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada-13557849) -
2020 - CRC - 6/25/19
218 Driving and Operating
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.
(Continued)
Caution (Continued)
.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
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 0218.
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
0 113.
{Warning
Fuel vapors and fuel fires burn
violently and can cause injury or
death.
(Continued)

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada-13557849) -
2020 - CRC - 6/25/19
Driving and Operating 221
Warning (Continued)
badly burned and the vehicle
could be damaged. To help avoid
injury to you and others:. Dispense fuel only into
approved containers.
. Do not fill a container while
it is inside a vehicle, in a
vehicle's trunk, in a pickup
bed, or on any surface other
than the ground.
. Bring the fill nozzle in
contact with the inside of
the fill opening before
operating the nozzle.
Maintain contact until filling
is complete.
. Keep sparks, flames, and
smoking materials away
from fuel.
. Do not use electronic
devices while pumping fuel.
Trailer Towing
General Towing
Information (Hatchback
Models)
{Warning
Never tow a trailer with your
vehicle. It was not designed or
intended to tow a trailer.
General Towing
Information (Station
Wagon Models)
Only use towing equipment that has
been designed for the vehicle.
Contact your dealer or trailering
dealer for assistance with preparing
the vehicle to tow a trailer. Read the
entire section before towing a trailer.
To tow a disabled vehicle, see
Towing the Vehicle 0309. To tow
the vehicle behind another vehicle
such as a motor home, see
Recreational Vehicle Towing 0310. When towing with the 2.0L L4
engine, only use unleaded gasoline
with an octane rating of 89 or
higher. Using gasoline with a lower
octane rating while towing may
damage the engine and may not be
covered by the vehicle warranty.
See
Recommended Fuel (2.0L
Turbo Engine) 0217 or
Recommended Fuel (3.6L Engine)
0 217.
Driving Characteristics
and Towing Tips
{Warning
You can lose control when towing
a trailer if the correct equipment is
not used or the vehicle is not
driven properly. For example,
if the trailer is too heavy or the
trailer brakes are inadequate for
the load, the vehicle may not stop
as expected. You and others
could be seriously injured. The
vehicle may also be damaged,
(Continued)