ethanol TOYOTA TUNDRA 2015 2.G Owners Manual

1954-4. Refueling
4
Driving
Opening the fuel tank cap
●Close all the doors and windows, and turn the engine switch to the
“LOCK” position.
● Confirm the type of fuel.
■Fuel types
Gasoline vehicles
Unleaded gasoline (Octane rating 87 [Research Octane Number 91] or
higher)
Flex-fuel vehicles
Unleaded gasoline (Octane rating 87 [Research Octane Number 91] or
higher), E85 or a blend of these two fuels. ( P. 520)
■ Identifying flex-fuel vehicles
■ E85 Fueling Stations (Flex-fuel vehicles)
E85 fueling stations and fuel pumps can be identified by the indication “E85
85% Ethanol”. For more information about fueling stations, please refer to the
U.S. Department of Energy Web site.
http://www.afdc.energy.gov/afdc/locator/stations/
Perform the following steps to open the fuel tank cap:
Before refueling the vehicle
Flex-fuel vehicles can be identified by the
fuel tank cap, which is marked “FLEX-
FUEL E85/GASOLINE”.

5119-1. Specifications
9
Vehicle specifications
Engine
Model1UR-FE, 3UR-FE, 3UR-FBE
Ty p e8-cylinder V-type, 4-cycle, gasoline
Bore and stroke
1UR-FE engine
3.70  3.27 in. (94.0  83.0 mm)
3UR-FE and 3UR-FBE engines
3.70  4.02 in. (94.0  102.0 mm)
Displacement
1UR-FE engine
281.2 cu.in. (4608 cm
3)
3UR-FE and 3UR-FBE engines
345.6 cu.in. (5663 cm
3)
Drive belt tensionAutomatic adjustment
Valve clearance
(engine cold)Automatic adjustment
Fuel
EngineGasoline engineFlex-fuel engine
Fuel typeUnleaded gasoline onlyUnleaded gasoline, E85,
or a blend of the two fuels
Octane rating
(Unleaded gaso-
line)
87 (Research octane number 91) or higher
Ethanol percent-
age (E85)—85% or less
Fuel tank capacity
(Reference)
Standard fuel tank: 26.4 gal. (100.0 L, 22.0 Imp.gal.)
Large fuel tank: 38.0 gal. (144.0 L, 31.7 Imp.gal.)

5209-1. Specifications
Fuel information
■Fuel tank opening for unleaded gasoline
To help prevent incorrect fueling, your vehicle has a fuel tank opening that
only accommodates the special nozzle on unleaded fuel pumps.
■ Fuel quality
In very few cases, driveability problems may be caused by the brand of fuel
you are using. If driveability problems persist, try changing the brand of fuel. If
this does not correct the problem, consult your Toyota dealer.
Gasoline engine
You must only use unleaded gasoline in your vehicle.
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 s hould meet the specifications of
ASTM D4814 in the U.S.A..
Flex-fuel engine
You must only use unleaded gasoline in your vehicle, E85, or a
blend of the two fuels.
Unleaded gasoline (Octane rating 87 [Research Octane Number
91] or higher), E85, or a blend of these two fuels is required for
optimum engine performance.
The use of unleaded gasoline with an octane rating lower than
87 may result in engine knocki ng. Persistent knocking can lead
to engine damage.
The use of fuel with an ethanol concentration in excess of 85%
will have a negative impact on driving performance and can
cause damage to the fuel system components.
At minimum, the gasoline you use s hould meet the specifications of
ASTM D4814 in the U.S.A..
At minimum, the E85 you use s hould meet the specifications of
ASTM D5798 in the U.S.A..

5219-1. Specifications
9
Vehicle specifications
■Gasoline quality standards
●Automotive manufacturers in the U.S.A., Europe and Japan have developed
a specification for fuel quality called the World-Wide Fuel Charter (WWFC),
which is expected to be applied worldwide.
● The WWFC consists of four categories that are based on required emission
levels. In the U.S., category 4 has been adopted.
● The WWFC improves air quality by lowering emissions in vehicle fleets, and
improves customer satisfaction through better performance.
■ E85 fuel (Flex-fuel vehicles)
●E85 fuel is a blend of 85% ethanol and 15% gasoline. However, E85 does
not necessarily contain 85% ethanol. For example, in cold climates the etha-
nol content of E85 may be reduced during the winter months to maintain
cold weather starting performance.
● E85 has less energy per gallon than gasoline, so you will need to fill your
fuel tank more frequently when using E85.
● The number of fuel stations that sell E85 fuel is limited. For more information
about fueling stations, please refer to the U.S. Department of Energy Web
site.
http://www.afdc.energy.gov/afdc/locator/stations/
■ Recommendation of the use of gaso line containing detergent additives
● Toyota recommends the use of gasoline detergent additives to avoid build-
up of engine deposits.
● All gasoline sold in the U.S.A. contains minimum detergent additives to
clean and/or keep clean intake systems, per EPA’s lowest additives concen-
tration program.
● Toyota strongly recommends the use of Top Tier Detergent Gasoline. For
more information on Top Tier Detergent Gasoline and a list of marketers,
please go to the official website www.toptiergas.com.
■ Recommendation of the use of cleaner burning gasoline
Cleaner burning gasoline, including reformulated gasoline that contains oxy-
genates such as ethanol or MTBE (Methyl Tertiary Butyl Ether) is available in
many areas.
Toyota recommends the use of cleaner burning gasoline and appropriately
blended reformulated gasoline. These types of gasoline provide excellent
vehicle performance, reduce vehicle emissions and improve air quality.

5229-1. Specifications
■Non-recommendation of the use of blended gasoline (gasoline engine)
●If you use gasohol in your vehicle, be sure that it has an octane rating no
lower than 87.
● Toyota does not recommend the use of gasoline containing methanol.
■ 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 adversely
affected.
The malfunction indicator lamp on the instrument cluster may come on. If this
happens, contact your Toyota dealer for service.
■ Toyota does not recommend blende d gasoline (Flex-fuel engine)
Do not use non-specified fuels such as the following.
● Fuels containing methanol.
● Fuels with more than 85% ethanol.
■ Toyota does not recommend the use of after-market fuel additives (Flex-
fuel engine)
Do not use any after-market fuel additives when repeatedly refueling with
E85, as some after-market fuel additives are not compatible with E85.
■ If your engine knocks
●Consult your Toyota dealer.
● You may occasionally notice light knocking for a short time while 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)

5239-1. Specifications
9
Vehicle specifications
NOTICE
■Notice on fuel quality
● Do not use improper fuels. If improper fuels are used, the engine will be
damaged.
● Do not use leaded gasoline.
Leaded gasoline can cause damage to your vehicle’s three-way catalytic
converters causing the emission control system to malfunction.
● Gasoline engine: Do not use gasohol other than the type previously
stated.
Other gasohol may cause fuel system damage or vehicle performance
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.
■ When use of non-specified fuels (Flex-fuel engine)
The use of non-specified fuels will have a negative impact on starting and
driving performance, and will cause damage to the fuel system compo-
nents. Therefore, do not add fuels such as the following.
● Fuels containing methanol
● Fuels with more than 85% ethanol
■ Fuel-related poor driveability
If poor driveability is encountered after using a different type of fuel (poor
hot starting, vaporization, engine knocking, etc.), 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.