oil pressure lexus LS400 1998 Audio System / LEXUS 1998 LS400 OWNER'S MANUAL (OM50498U)

GAUGES, METERS AND SERVICE REMINDER INDICATORS
44
(b) Warning messages
13L052
Reminder light
W40
W40
When the engine oil pressure becomes too low, the above
message appears, the reminder light flashes and the warning
tone sounds.
If this message appears while you are driving, pull off the road to a
safe place and stop the engine immediately. Call a Lexus dealer or
qualified repair shop for assistance.
The message may appear when the oil level is extremely low. It is
not designed to indicate low oil level, and the oil level must be
checked using the oil level dipstick.
NOTICE
Do not drive the vehicle with the warning message displayed
even for one block. It may ruin the engine.
W41 W41
When your brake pads are worn enough to require replacement,
the above message appears, the reminder light flashes and the
warning tone sounds.
If this message appears while you are driving, have the brake pads
checked and replaced by your Lexus dealer as soon as possible.
W43 W43
W42
W42
W451
W44
W44
W46
W46
When any door or trunk is open with the ignition switch turned
on, the message which door or trunk is open appears, and the
reminder light comes on.

DRIVING TIPS
189
HOW TO SAVE FUEL AND MAKE
YOUR VEHICLE LAST LONGER
Getting more kilometer/mileage from a liter/gallon of fuel 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.
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.
Stopandgo driving wastes fuel.Avoid unnecessary stopping and braking. Maintain a steady
pace. Try to time the traffic 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 needless
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.
Keep your vehicle tunedup and in top shape. A dirty air
cleaner, improper valve clearance, dirty plugs, dirty oil and
grease, brakes not adjusted, etc. all lower engine performance and
contribute to poor fuel economy. For longer life of all parts and
lower operating costs, keep all maintenance work on schedule,
and if you often drive under severe conditions, see that your
vehicle receives more frequent maintenance. (For scheduled
maintenance information, please refer to the separate ”Owner’s
Manual Supplement/Maintenance Schedule”.)
CAUTION

ENGINE
229
FACTS ABOUT ENGINE OIL
CONSUMPTION
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 highspeed driving and frequent
acceleration and deceleration.
A new engine consumes more oil, since its pistons, piston rings and
cylinder walls have not become conditioned.
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.
Importance of engine oil level check
One of the most important points in proper vehicle maintenance is
to keep the engine oil at the optimum level so that oil function will
not be impaired. Therefore, it is essential that the oil level be
checked regularly. Lexus recommends that the oil level be checked
every time you refuel the vehicle.
NOTICE

CHASSIS
237
SPECIFICATIONS
AUTOMATIC TRANSMISSION
Fluid capacity
Drain and refill
Fluid type
1.9 L (2.0 qt., 1.7 lmp.qt.)
Automatic transmission fluid Type T IV or equivalent
DIFFERENTIAL
Oil capacity
Oil type
Oil viscosity
1.3 L (1.4 qt., 1.1 lmp.qt.)
Hypoid gear oil API GL5
Above 18C (0F): SAE 90
Below 18C (0F): SAE 80W or SAE 80W90
BRAKES
Pedal clearance
Pedal freeplay
Brake pad wear limit
Parking brake lining wear limit
Parking brake adjustment
Fluid type
70 mm (2.8 in.) Min. *1
1 6 mm (0.04 0.24 in.)
1.0 mm (0.04 in.)
1.0 mm (0.04 in.)
5 7 clicks *
2
SAE J1703 or FMVSS No. 116 DOT 3
*1: Minimum pedal clearance when depressed with the pressure of 490 N (50 kgf, 110 lbf.) with the engine running
*
2: Parking brake adjustment when depressed with the pressure of 294 N (30 kgf, 66.1 lbf.)

GAS STATION INFORMATION
Fuel selection:
Select premium unleaded gasoline with an Octane Rating of 91
(Research Octane Number 96) or higher for optimum engine
performance. However, if such premium type cannot be
obtained, you may temporarily use unleaded gasoline with an
Octane Rating as low as 87 (Research Octane Number 91).
Fuel tank capacity:
85 L (22.5 gal., 18.7 lmp.gal.)
Engine oil:
API SH, ”EnergyConserving II” or SJ, ”EnergyConserving”
multigrade engine oil or ILSAC multigrade engine oil.
Recommended oil viscosity SAE 5W30 if normal
temperatures are below 38C (100F)
Oil capacity: L (qt., lmp.qt.)
Drain and refill
with filter 5.6 (5.9, 4.9)
without filter 5.3 (5.6, 4.7)
See page 230 for detailed information.
Engine coolant:
Capacity: 10.8 L (11.4 qt, 10.4 lmp.qt.)
Coolant type Ethylene glycol coolant (Do not use alcohol
coolant.)
For checking the engine coolant, see page 233.
For changing the engine coolant, see the label on the coolant
reservoir.Automatic transmission:
Fluid type Automatic transmission fluid Type TIV or
equivalent
Tire information:
See page 241 through 247 for detailed information.
Tire pressure:
Tire size: P225/60R16 97V
cold tires
kPa (kgf/cm
2
or bar, psi)
Vehicle loaded up
Vehicle load up to vehicle capacity
up to occupants weight
Front tires 200 (2.0, 29) 220 (2.2, 32). . . . . . . . . . . . .
Rear tires 200 (2.0, 29) 220 (2.2, 32). . . . . . . . . . . . .
For sustained high speeds above 160 km/h (100 mph), in
countries where such speeds are permitted by law, add 80 kPa
(0.9 kgf/cm
2, 0.8 bar, 12 psi) to the front tires and rear tires, but
never exceed the maximum cold tire pressure molded on the tire
sidewall.
LS400 (U) 98