2001 Lexus ES300 fuel consumption

DRIVING TIPS
327
TRAILER TOWING
Your vehicle is designed primarily as a
passenger±carrying vehicle. Towing a trailer will 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.

DRIVING TIPS
338
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 warm±up idling. Once the engine is
running smoothly, begin driving ± but gently.
Remember, however, that on cold winter days this
may take a little longer.
 Keep the automatic transmission overdrive
turned on when engine braking is not required.
Driving with the overdrive off will reduce the fuel
economy. (For details, see ªAutomatic transmissionº
on page 284.)
 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 over±revving . Use a gear position
suitable for the road on which you are traveling.

DRIVING TIPS
339

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 traffic si gnals
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. 
Keep your vehicle tuned±up 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 ªOwner's Manual
Supplement/Maintenance Scheduleº.)

SECTION 6 ± 2
400
SERVICE PROCEDURES AND
SPECIFICATIONS
Engine
Specifications 401. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel 404
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . .
Facts about engine oil consumption 407
. . . . . . . . . . . . .
Used engine oil 409
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the engine oil level 410
. . . . . . . . . . . . . . . . . . .
Checking the engine coolant level 415
. . . . . . . . . . . . . . .
Spark plugs 419
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ENGINE
407
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 under driving conditions such as
high speeds 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.