2005 LEXUS LS430 fuel consumption

GAUGES, METERS AND SERVICE REMINDER INDICATORS
90
MULTIINFORMATION DISPLAY
13L146
The multiinformation display provides various
information, including your vehicle’s driving condition,
outside temperature, and warning messages if your
vehicle is in trouble.
During ordinary driving, cruise information and graphic
information are displayed. However, if any problem
occurs in your vehicle, a warning message appears above
the cruise information.
(a) Cruise information
13L197
 1 “DISP1” button 2“DISP2” button
3“RESET” button
The following information is shown with the ignition
switch turned on. Each time you push the “DISP1” button,
the displayed information is changed.
 Available driving distance
 Average fuel consumption
 Current fuel consumption
 Average fuel consumption after being refueled
 Driving distance after being refueled
 Elapsed time
 Average vehicle speed
 Blank

GAUGES, METERS AND SERVICE REMINDER INDICATORS
91
The displayed cruise information values indicate the general
driving
condition and may not always reflect precise and actual
conditions.
 Available driving distance
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When the fuel gauge is close to “F”
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When the fuel gauge is close to middle
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When the fuel gauge is close to “E”
The available driving distance is calculated and displayed
depending on the amount of remaining fuel.
 Average fuel consumption
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The average fuel consumption is calculated and displayed
based on the total driving distance and the total fuel
consumption with the engine running.
The value is updated every 10 seconds.
To begin recalculating, push the “RESET” button for about 1 to
2 seconds.
 Current fuel consumption
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The current fuel consumption is calculated and displayed
based on the driving distance and the fuel consumption
per 2 second interval with the engine running.
The value is updated every 2 seconds.
If you are driving at low speeds just before stopping, the
accurate figure may not be shown.
Average fuel consumption after refueling
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The average fuel consumption after refueling is
calculated and displayed based on the total driving
distance and the total fuel consumption after refueling.
The value is updated every 10 seconds.
When refueling, be sure to stop your vehicle and turn the
ignition switch off.
The average fuel consumption could not be calculated in either
of the following cases:
 Refueled by opening the fuel filler door using the manual
lever in the trunk
 Refueled with a small quantity of gasoline
To begin recalculating, push the “RESET” button for about 1 to
2 seconds.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
92The multi−
information display shows “Tank Avg –.– MPG” for
a while after refueling or pushing the “RESET” switch, and then
shows the previous average fuel consumption until you start
the vehicle.
 Driving distance after refueling
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The driving distance after refueling is displayed.
When refueling, be sure to stop your vehicle and turn the
ignition switch off.
The driving distance after refueling could not be calculated in
either of the following cases:
 Refueled by opening the fuel filler door using the manual
lever in the trunk
 Refueled with a small quantity of gasoline
To begin recalculating, push the “RESET” button for about 1 to
2 seconds.
 Elapsed time
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The total time that the engine has been running is
displayed.
When the engine is started again after the ignition is off, the
driving time is added to the previous value. Up to 99 hours 59
minutes can be displayed. When the driving time exceeds 99
hours 59 minutes, the display returns to 0 and recounting
starts.
To begin recalculating, push the “RESET” button for about 1 to
2 seconds.
 Average vehicle speed
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The average vehicle speed is calculated and displayed
based on the total driving distance and the total driving
time with the engine running.
The displayed value is updated every 10 seconds.
To begin recalculating, push the “RESET” button for about 1 to
2 seconds.

DRIVING TIPS
386
TRAILER TOWING
Your vehicle is designed primarily as a passenger−carrying
vehicle. Towing a trailer w ill have an adverse effect on
handling, performance, braking, durability and driving
economy (fuel consumption, etc.). Your safety and satisfaction
depend on the proper use of correct equipment and cautious
driving habits. For your safety and the safety of others, you
must not overload your vehicle or trailer. Lexus warranties do
not apply to damage or malfunction caused by towing a trailer
for commercial purposes. Ask your local Lexus dealer for
further details before towing.
NOTICE
When towing a trailer, be sure to consult your Lexus
dealer for further information on additional
requirements such as a towing kit, etc.
Weight limits
Before towing, make sure the total trailer weight, gross
vehicle weight, gross axle weight and trailer tongue load
are all within the limits.
The total trailer weight and tongue load can be measured with
platform scales found at a highway weighing station, building
supply company, trucking company, junk yard, etc.
61L066
 Certification label
CAUTION
 The total trailer weight (trailer weight plus its cargo
load) must not exceed 907 kg (2000 lb.). Exceeding
this weight is dangerous.

DRIVING TIPS
392
HOW TO SAVE FUEL AND MAKEYOUR VEHICLE LAST LONGER
Improving fuel economy is easy − just take it easy. It will help
make your vehicle last longer, too. Here are some specific tips
on how to save money on both fuel and repairs:
 Keep your tires inflated at the correct pressure. Check
the pressure every two weeks, or at least once a month.
Underinflation causes tire wear and wastes fuel.
 Do not carry unneeded weight in your vehicle. Excess
weight puts a heavier load on the engine, causing greater
fuel consumption.
 Avoid lengthy warmup idling. Once the engine is
running smoothly, begin driving − but gently. Remember,
however, that on cold winter days this may take a little
longer.
 Always keep the automatic transmission selector lever
in the “D” position when engine braking is not required.
Driving with the overdrive off will reduce the fuel economy
(For details, see “Automatic transmission” on page 305.)
 Accelerate slowly and smoothly. Avoid jackrabbit starts.
 Avoid long engine idling. If you have a long wait and you
are not in traffic, it is better to turn off the engine and start
again later.
 Avoid engine overrevving. Use a gear position suitable
for the road on which you are traveling. 
Avoid continuous speeding up and slowing down.
Stop−and−go driving wastes fuel.
 Avoid unnecessary stopping and braking. Maintain a
steady pace. Try to time the traf fic signals so you only need
to stop as little as possible or take advantage of through
streets to avoid traffic lights. Keep a proper distance from
other vehicles to avoid sudden braking. This will also
reduce wear on your brakes.
 Avoid heavy traffic or traffic jams whenever possible.
 Do not rest your foot on the brake pedal. This causes
premature wear, overheating and poor fuel economy.
 Maintain a moderate speed on highways. The faster you
drive, the greater the fuel consumption. By reducing your
speed, you will cut down on fuel consumption.
 Keep the front wheels in proper alignment. Avoid hitting
the curb and slow down on rough roads. Improper
alignment not only causes faster tire wear but also puts an
extra load on the engine, which, in turn, wastes fuel.
 Keep the bottom of your vehicle free from mud, etc.
This not only lessens weight but also helps prevent
corrosion.

SECTION 6 – 2
443
SERVICE PROCEDURES AND
SPECIFICATIONS316.
Engine
Specifications444
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Fuel 447
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Fuel pump shut off system 449
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Facts about engine oil consumption 450
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Used engine oil 451
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Checking the engine oil level 452
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Checking the engine coolant level 455
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Checking the radiator and condenser 457
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Spark plugs 457
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ENGINE
450
324.FACTS ABOUT ENGINE OILCONSUMPTION
Functions of engine oil
Engine oil has the primary function of lubricating and cooling
the inside of the engine, and plays a major role in maintaining
the engine in proper working order.
Engine oil consumption
It is normal that an engine should consume some engine
oil during normal engine operation. The causes of oil
consumption in a normal engine are as follows.
Oil is used to lubricate pistons, piston rings and cylinders.
A thin film of oil is left on the cylinder wall when a piston
moves downwards in the cylinder. High negative pressure
generated when the vehicle is decelerating sucks some of
this oil into the combustion chamber. This oil as well as
some part of the oil film left on the cylinder wall is burned by
the high temperature combustion gases during the
combustion process.
 Oil is also used to lubricate the stems of the intake valves.
Some of this oil is sucked into the combustion chamber
together with the intake air and is burned along with the fuel.
High temperature exhaust gases also burn the oil used to
lubricate the exhaust valve stems. The amount of engine oil consumed depends on the
viscosity of the oil, the quality of the oil and the way the
vehicle is driven.
More oil is consumed by high−
speed driving and frequent
acceleration and deceleration.
A new engine consumes more oil, since its pistons, piston rings
and cylinder walls have not become conditioned.
Oil consumption: Max. 1.0 L per 1000 km (1.1 qt./600 miles,
0.9 lmp. qt./600 miles)
When judging the amount of oil consumption, keep in
mind that the oil may have become diluted, making it
difficult to judge the true level accurately.
For example, if a vehicle is used for repeated short trips and
consumes a normal amount of oil, the dipstick may not show
any drop in the oil level at all, even after 1000 km (600 miles)
or more. This is because the oil is gradually becoming diluted
with fuel or moisture, making it appear that the oil level has not
changed.
The diluting ingredients evaporate out when the vehicle is then
driven at high speeds, as on an expressway, making it appear
that oil is excessively consumed after driving at high speeds.