2008 Lexus IS F engine

401
6-1. Specifications
6
Vehicle specifications
08_IS F_U_(L/O_0711)
Engine
Fuel
Model2UR-GSE
Ty p e8-cylinder V type, 4-cycle, gasoline
Bore and stroke3.70 × 3.52 in. (94.0 × 89.5 mm)
Displacement 303.2 cu.in. (4969 cm3)
Drive belt tensionAutomatic adjustment
Fuel typeUnleaded gasoline only
Octane rating91 (Research octane number 96) or higher
Fuel tank capacity16.9 gal. (64 L, 14.0 lmp.gal)

402
6-1. Specifications
08_IS F_U_(L/O_0711)
Lubrication system
*: 5W-30 is an oil that provides optimal levels of fuel efficiency.
Oil viscosity
● The 5W portion of the oil viscosity rating indicates the characteristic of
the oil which allows cold startability. Oils with a lower value before the W
allow for easier starting of the engine in cold weather.
● The 30 in 5W-30 indicates the oil viscosity when the oil is at its operating
temperature. An oil with a higher viscosity may be better suited if the
vehicle is operated at high speeds, or under extreme load condition.
Oil capacity
(drain and refill)
with filter 9.8 qt. (9.3 L, 8.2 lmp.qt.)
without filter8.7 qt. (8.2 L, 7.2 lmp.qt.)
Oil gradeILSAC multi-grade engine oil
Recommended oil
viscosity
Use Lexus approved “Toyota Genuine Motor Oil” or
equivalent to satisfy the grade and viscosity shown
below.
Outside temperature

403
6-1. Specifications
6
Vehicle specifications
08_IS F_U_(L/O_0711)
Cooling system
Ignition system
Capacity12.6 qt. (11.9 L, 10.5 lmp.qt.)
Coolant type
Use either of the following.• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based non-sili-cate, non-amine, non-nitrite, and non-borate cool-
ant with long-life hybrid organic acid technology
Do not use plain water alone.
Spark plug
Make
GapDENSO FK20HBR11
0.043 in. (1.1 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust gap when tuning engine.

404
6-1. Specifications
08_IS F_U_(L/O_0711)
Electrical system
Differential
*: “Toyota Genuine Differential Gear Oil” is filled in your Lexus vehicle at factory
fill. Use Lexus approved “Toyota Genuine Differential Gear Oil” or an equiva-
lent of matching quality to satisfy the above specification. Please contact your
Lexus dealer for further details.
Battery
Open voltage* at
68 °F (20 °C):12.6  12.8 V Fully charged
12.2 
12.4 V Half charged
11.8 
12.0 V Discharged
(*: Voltage checked 20 minutes after
the engine and all the lights are turned
off)
Charging rates5 A max.
Oil capacity1.42 qt. (1.35 L, 1.19 lmp.qt.)
Oil type and viscosity*“Toyota Genuine Differential Gear Oil
LT 75W-85 GL-5” or equivalent

406
6-1. Specifications
08_IS F_U_(L/O_0711)
Brakes
*1: Minimum pedal clearance when depressed with a force of 110 lbf (490 N, 50
kgf) while the engine is running.
*2: Parking brake pedal travel when depressed with a force of 67.4 lbf (300 N,30.6 kgf).
Pe d a l c l e a r a n c e *14.3 in. (110 mm) Min.
Pedal free play0.04  0.08 in. (1.0  2.0 mm)
Brake pad wear limit0.04 in. (1.0 mm)
Parking brake lining wear limit0.04 in. (1.0 mm)
Parking brake pedal travel *27  9 clicks
Fluid typeSAE J1703 or FMVSS No. 116 DOT 3

409
6-1. Specifications
6
Vehicle specifications
08_IS F_U_(L/O_0711)
Fuel information
■Fuel tank opening for unleaded gasoline
To help prevent incorrect fueling, your Lexus has a fuel tank opening that only
accommodates the special nozzle on unleaded fuel pumps.
■If premium gasoline is not available
If 91 rating gasoline cannot be obtained, you may use unleaded gasoline with an
octane rating as low as 87 (Research Octane Rating 91).
■If your engine knocks
●Consult your Lexus dealer.
●You may occasionally notice light knocking for a short time while accelerating
or driving uphill. This is normal and there is no need for concern.
■Gasoline quality
In very few cases, driveability problems may be caused by the brand of gasoline you
are using. If driveability problems persist, try changing the brand of gasoline. If this
does not correct the problem, consult your Lexus dealer.
Your vehicle must use only unleaded gasoline.
Premium unleaded gasoline with an octane rating of 91 (Research Octane
Number 96) or higher required for optimum engine performance.
At minimum, the gasoline you use should meet the specifications of
ASTM D4814 in the U.S.A. and CGSB3.5-M93 in Canada.

410
6-1. Specifications
08_IS F_U_(L/O_0711)
■Gasoline quality standards
●Automotive manufacturers in the US, Europe and Japan have developed a
specification for fuel quality called World-Wide Fuel Charter (WWFC) that is
expected to be applied worldwide.
●The WWFC consists of four categories that are based on required emission
levels. In the US, category 4 has been adopted.
●The WWFC improves air quality by lowering emissions in vehicle fleets, and
customer satisfaction through better performance.
■Lexus recommends the use of gasoline containing detergent additives
●Lexus recommends the use of gasoline that contains detergent additives to
avoid build-up of engine deposits.
●All gasoline sold in the US contains detergent additives to clean and/or keep
clean intake systems.
■Lexus recommends the use of cleaner burning gasoline
Cleaner burning gasoline, including reformulated gasoline that contains oxygen-
ates such as ethanol or MTBE (Methyl Tertiary Butyl Ether) is available in many
areas.
Lexus recommends the use of cleaner burning gasoline and appropriately blended
reformulated gasoline. These types of gasoline provide excellent vehicle perfor-
mance, reduce vehicle emissions and improve air quality.
■Lexus does not recommend blended gasoline
●Lexus allows the use of oxygenate blended gasoline where the oxygenate con-
tent is up to 10% ethanol or 15% MTBE.
●If you use gasohol in your Lexus, be sure that it has an octane rating no lower
than 87.
●Lexus DOES NOT recommend the use of gasoline containing methanol.
■Lexus does not recommend gasoline containing MMT
Some gasoline contains octane enhancing additive called MMT (Methylcyclopen-
tadienyl Manganese Tricarbonyl).
Lexus DOES NOT recommend the use of gasoline that contains MMT. If fuel con-
taining MMT is used, your emission control system may be adversely affected.
The malfunction indicator lamp on the inst rument cluster may come on. If this hap-
pens, contact your Lexus dealer for service.

411
6-1. Specifications
6
Vehicle specifications
08_IS F_U_(L/O_0711)
NOTICE
■Notice on gasoline quality
●Do not use leaded gasoline.
Leaded gasoline can cause damage to your vehicle’s three-way catalytic convert-
ers causing the emission control system to malfunction.
●Do not use gasohol other than that stated here.
Other gasohol may cause fuel system damage or vehicle performance problems.
●Use of unleaded gasoline with an octane rating lower than 91 may result in engine
knocking. Persistent knocking can lead to engine damage and should be cor-
rected by refueling with higher octane unleaded gasoline.
■Fuel-related poor driveability
If after using a different type of fuel, poor driveability is encountered (poor hot start-
ing, 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.