2021 TOYOTA TUNDRA engine

5518-1. Specifications
8
Vehicle specifications
Fuel information
■Gasoline quality
In very few cases, driveability problems may be caused by the b rand of gaso-
line you are using. If driveability problems persist, try changing the brand of
gasoline. If this does not correct the problem, consult your To yota dealer.
■ Recommendation of the use of gaso line containing detergent additives
● Toyota recommends the use of gasoline that contains detergent a dditives to
avoid build-up of engine deposits.
● All gasoline sold in the U.S.A. contains minimum detergent addi tives to
clean and/or keep clean intake systems, per EPA’s lowest additi ves concen-
tration program.
● Toyota strongly recommends the use of Top Tier Detergent Gasoli ne. For
more information on Top Tier Detergent Gasoline and a list of m arketers,
please go to the official website www.toptiergas.com.
■ Recommendation of the use of low emissions gasoline
Gasolines containing oxygenates such as ethers and ethanol, as well as
reformulated gasolines, are available in some cities. These fue ls are typically
acceptable for use, providing they meet other fuel requirements .
Toyota recommends these fuels, since the formulations allow for reduced
vehicle emissions.
You must only use unleaded gasoline.
Select octane rating 87 (Research Octane Number 91) or higher.
Use of unleaded gasoline with an octane rating lower than 87
may result in engine knocking. Persistent knocking can lead to
engine damage.
At minimum, the gasoline you use should meet the specifications of
ASTM D4814 in the U.S.A.

5528-1. Specifications
■Non-recommendation of the use of blended gasoline
●If you use gasohol in your vehicle, be sure that it has an octa ne rating no
lower than 87.
● Toyota does not recommend the use of gasoline containing methan ol.
■ Non-recommendation of the use of gasoline containing MMT
Some gasoline contains an octane enhancing additive called MMT (Methylcy-
clopentadienyl Manganese Tricarbonyl).
Toyota does not recommend the use of gasoline that contains MMT. If fuel
containing MMT is used, your emission control system may be adv ersely
affected.
The malfunction indicator lamp on the instrument cluster may come on. If this
happens, contact your Toyota dealer for service.
■ If your engine knocks
●Consult your Toyota dealer.
● You may occasionally notice light knocking for a short time whi le accelerat-
ing or driving uphill. This is normal and there is no need for concern.
●
Use only gasoline containing up to 15%
ethanol.
DO NOT use any flex-fuel or gasoline
that could contain more than 15% etha-
nol, including from any pump labeled
E30, E50, E85 (which are only some
examples of fuel containing more than
15% ethanol).
DO NOT use gasoline contain-
ing more than 15% ethanol.
(30% ethanol)
(50% ethanol)
(85% ethanol)

5538-1. Specifications
8
Vehicle specifications
NOTICE
■Notice on fuel quality
● Do not use improper fuels. If improper fuels are used, the engi ne will be
damaged.
● Do not use leaded gasoline.
Leaded gasoline can cause damage to your vehicle’s three-way ca talytic
converters causing the emission control system to malfunction.
● Do not use gasohol other than the type previously stated.
Other gasohol may cause fuel system damage or vehicle performan ce
problems.
● Using unleaded gasoline with an octane number or rating lower than the
level previously stated will cause persistent heavy knocking.
At worst, this will lead to engine damage.
■ Fuel-related poor driveability
If poor driveability (poor hot starting, vaporization, engine k nocking, etc.) is
encountered after using a different type of fuel, discontinue the use of that
type of fuel.
■ When refueling with gasohol
Take care not to spill gasohol. It can damage your vehicle’s paint.

5598-1. Specifications
8
Vehicle specifications
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pres-
sure
Tire pressure when the vehicle has been
parked for three hours or more, or has not
been driven more than 1 mile or 1.5 km under
that condition
Maximum inflation
pressureThe maximum cold inflated pressure to which
a tire may be inflated, shown on the sidewall
of the tire
Recommended infla-
tion pressureCold tire inflation pressure recommended by a
manufacturer
Accessory weight
The combined weight (in excess of those stan-
dard items which may be replaced) of auto-
matic transmission, power steering, power
brakes, power windows, power seats, radio
and heater, to the extent that these items are
available as factory-installed equipment
(whether installed or not)
Curb weight
The weight of a motor vehicle with standard
equipment, including the maximum capacity of
fuel, oil and coolant, and if so equipped, air
conditioning and additional weight optional
engine
Maximum loaded vehi-
cle weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant
weight150 lb. (68 kg) times the number of occupants
specified in the second column of Table 1
*
that follows
Occupant distributionDistribution of occupants in a vehicle as speci-
fied in the third column of Table 1
* below
Production options
weight
The combined weight of installed regular pro-
duction options weighing over 5 lb. (2.3 kg) in
excess of the standard items which they
replace, not previously considered in curb
weight or accessory weight, including heavy
duty brakes, ride levelers, roof rack, heavy
duty battery, and special trim

5728-2. Customization
■Illumination (P. 3 5 7 )
*: Vehicles with a smart key system
■
Seat Belt Reminder Buzzer ( P. 486)
FunctionDefault settingCustomized
setting
Time elapsed before lights
turn off 15 seconds7.5 seconds—O O30 seconds
Operation after the engine
is off On
Off
—— O
Operation when the doors
are unlocked On Off—— O
Operation when you
approach the vehicle with
the electronic key on your
person
*
On
Off — — O
123
FunctionDefault settingCustomized
setting
Vehicle speed linked seat
belt reminder buzzerOnOff—— O
123

5738-2. Customization
8
Vehicle specifications
■Vehicle customization
●When the speed-detecting automatic door lock function and shift position
linked door locking function (shifting gears to a position other than P locks
all doors) are both on, the door lock operates as follows.
• When shifting the shift lever to any position other than P, al l the doors will
be locked.
• If the vehicle is started with all the doors locked, the speed-detecting auto- matic door lock function would not operate.
• If the vehicle is started with any the door unlocked, the spee d-detecting
automatic door lock function will operate.
● When the doors remain closed after unlocking the doors and the automatic
door lock function (Time elapsed before the automatic door lock function is
activated if a door is not opened after being unlocked) activates, the signals
will be generated in accordance with operation signal (buzzers) and the
operation signal (emergency flashers) settings.
WARNING
■ During customization
As the engine needs to be running during customization, ensure that the
vehicle is parked in a place with adequate ventilation. In a closed area such
as a garage, exhaust gases including harmful carbon monoxide (CO) may
collect and enter the vehicle. This may lead to death or seriou s health haz-
ard.
NOTICE
■ During customization
To prevent battery discharge, ensure that the engine is running while cus-
tomizing features.

590
■Cargo weight rating
No.EngineDriveCabBedGradePassenger
Cargo
Weight Rating
lbskg
1
3UR-FE
2WD
Double
Cab
Stan-dardSR56525238
2Limited5635288
3LongSR56500227
4
4WD
Stan-
dardSR56420191
5Limited5550249
6LongSR56390177
7
2WD
Crew MaxShort
SR56425193
8Limited5540245
9Plati-
num5530240
10
4WD
SR56335152
11Limited5435197
12Plati-num5435197

592
■GAWR and GVWR
Double Cab models
*:The model code is indicated on the Certification Label. (P. 5 4 1)
CrewMax models
*:The model code is indicated on the Certification Label. (P. 5 4 1)
Model
code
*EngineDriving
systemBed
typeGAWRGVWRFrontRear
USK51L-
CRTSKA
3UR-FE2WD
Stan-
dard 3900 lb.
(1770 kg) 4100 lb.
(1860 kg) 6900 lb.
(3130 kg)
USK51L-
CRTLKA
USK52L-
CHTSKA Long
4150 lb.
(1880 kg)
7000 lb.
(3175 kg)
USK56L-
CRTSKA
4WDStan-
dard
4000 lb.
(1815 kg)
7100 lb.
(3220 kg)
USK56L-
CRTLKA
USK57L-
CHTSKA Long
7200 lb.
(3265 kg)
Model code
*EngineDriving
systemBed
typeGAWRGVWRFrontRear
USK51L-
PSTSKA
3UR-FE2WD
Short3900 lb.
(1770 kg)
4150 lb.
(1880 kg) 7000 lb.
(3175 kg)
USK51L-
PSTLKA
USK51L-
PSTZKA
USK56L-
PSTSKA
4WD
4000 lb.
(1815 kg)7200 lb.
(3265 kg)
USK56L-
PSTLKA
USK56L-
PSTZKA