octane TOYOTA TACOMA 1998 Owners Manual

'98 Tacoma (U)139
OCTANE RATING
Select Octane Rating 87 (Research Oc-
tane Number 91) or higher.
Use of unleaded gasoline with an octane
rating or research octane number lower
than stated above will cause persistent
heavy knocking. If it is severe, this will
lead to engine damage.
If your engine knocks...
If you detect heavy knocking even when
using the recommended fuel, or if you
hear steady knocking while holding a
steady speed on level roads, consult your
Toyota dealer.
However, now and then, you may notice
light knocking for a short time while accel-
erating or driving up hills. This is no need
of concern.
GASOLINES CONTAINING DETERGENT
ADDITIVES
Toyota recommends use of gasolines
that contain detergent additives to
avoid build-up of engine deposits.
For further details, ask your Toyota dealer
or a local gasoline retailer.
IMPROVED GASOLINES
The American Automobile Manufacturers
Association (AAMA) has developed a
specification of improved gasolines. The
AAMA specification offers optimal fuel
information for better vehicle perfor-
mance and better protection of your en-
gine.
Toyota recommends the use of gasolines
that meet the AAMA specification, if avail-
able, for improved driveability and emis-
sion control system.
GASOLINES CONTAINING MTBE
Gasolines that contain MTBE (Methyl
Tertiary-Butyl Ether) are available in the
market. If you use a gasoline mixed
with MTBE, make certain that it does
not contain more than 15 % of MTBE.
If the use of gasolines containing MTBE
causes poor driveability and/or poor fuel
economy, you should discontinue the use
of fuels containing MTBE.
GASOLINES CONTAINING MMT
Some gasolines contain an octane- en-
hancing additive called MMT (methylcy-
clopentadienyl manganese tricarbonyl).Toyota does not recommend the use of
gasolines that contain MMT. If fuels con-
taining MMT are used, your emission con-
trol system may be adversely affected.
The Malfunction Indicator Lamp on the in-
strument cluster may come on. If this hap-
pens, contact your Toyota dealer for ser-
vice.
GASOLINES CONTAINING ALCOHOL
If you use gasohol in your Toyota, be
sure that it is unleaded, has an octane
rating no lower than 87 and does not
contain more than 10 % ethanol.
Gasohol is a mixture of gasoline and etha-
nol.
Toyota does not recommend the use of
gasolines containing methanol. If you use
gasoline containing methanol, use only
gasoline meeting the requirements above
and also containing less than 5 % metha-
nol with cosolvents and corrosion inhibi-
tors for methanol.

'98 Tacoma (U)
140
NOTICE
Do not use gasohol other than stated above. It will cause fuel sys-tem damage or vehicle performance problems.
If driveab ility problems occur ( poor
hot starting, vaporizing, engine knock, etc.), discontinue the use.
Take care not to spill gasohol dur-ing refueling. Gasohol may cause
paint damage.
FUEL TANK CAPACITY
Two-wheel drive models
except Pre Runner 57 L (15.1 gal., 12.5 Imp. gal.)
Four-wheel drive models
and Pre Runner 68 L (18.0 gal., 15.0 Imp. gal.) Operation in foreign countries
If you plan to drive your Toyota in
another country...
First,
comply with the vehicle registration
laws.
Second, confirm the availability of the cor-
rect fuel (unleaded and minimum octane
number).

'98 Tacoma (U)
228
Fuel
Fuel type:
Unleaded gasoline, Octane Rating 87
(Research Octane Number 91) or high- er
Fuel tank capacity, L (gal., Imp. gal.):
Two-wheel drive models
except Pre Runner57 (15.1, 12.5)
Four-wheel drive models
and Pre Runner 68 (18.0, 15.0) Service specifications
ENGINE
Valve clearance (engine cold), mm (in.):
2RZ- FE and 3RZ- FE enginesIntake 0.15Ð0.25 (0.006Ð0.010)
Exhaust 0.25Ð0.35 (0.010Ð0.014)
5VZ- FE engine Intake 0.13Ð0.23 (0.006Ð0.009)
Exhaust 0.27Ð0.37 (0.011Ð0.014)
Spark plug type: 2RZ- FE and 3RZ- FE enginesDENSO K16R- U
NGK BKR5EYA
5VZ- FE engine DENSO K16TR11
NGK BKR5EKB11
Spark plug gap, mm (in.): 2RZ- FE and 3RZ- FE engines0.8 (0.031)
5VZ- FE engine 1.1 (0.043) Drive belt tension measured with Bor-
roughs drive belt tension gauge No.
BT- 33- 73F (used belt), lbf:
2RZ- FE and 3RZ- FE enginesGenerator belt 115 20
Air conditioning
compressor belt 100 20
Power steering
pump belt 100 +20
-15
5VZ- FE engine
Generator belt 100 20
Air conditioning compressor belt 100 20
Power steering
pump belt 100 +20
-15

Publication No. OM35729U
Part No. 01999-35729
Printed in Japan 01-9801-00
(U)
Quick index
If a service reminder indicator or warning buzzer comes on 70 . . . . . . . .
If your vehicle will not start 164
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
If your engine stalls while driving 167
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
If your vehicle overheats 168
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
If you have a flat tire 169
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
If your vehicle needs to be towed 177
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tips for driving during break-in period 138 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to start the engine 151
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General maintenance 193
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Complete index NO TAG
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Gas station information
Fuel type: UNLEADED gasoline, Octane Rating 87 (Research Octane Number 91)
or higher
See page 138 for detailed information.
Fuel tank capacity: Two-wheel drive models except Pre Runner
57 L (15.1 gal., 12.5 lmp. gal.)
Four-wheel drive models and Pre Runner
68 L (18.0 gal., 15.0 lmp. gal.)
Engine oil:
API grade SH, ºEnergy- Conserving IIº or SJ, Energy- Conservingº
multigrade engine oil or ILSAC multigrade engine oil is recommended.
See page 207 for detailed information.
Tire information: See pages 210 through 214.
Tire pressure: See page 232. f
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