ENGINE
197
Oil identification marks
API Service SymbolILSAC Certification Mark
Either or both API registered marks are added to some oil
containers to help you select the oil you should use.
The API Service Symbol is located anywhere on the
outside of the container.
The top portion of the label shows the oil quality by API
(American Petroleum Institute) designation such as SH.
The center portion of the label shows the SAE viscosity
grade such as SAE 5W±30. ªEnergy±Conserving IIº,
shown in the lower portion, indicates that the oil has
fuel±saving capabilities. Oils marked ªEnergy±Conserving
IIº will have higher fuel±saving capabilities than oils
marked ªEnergy±Conservingº.
The ILSAC (International Lubricant Standardization and
Approval Committee) Certification Mark is displayed on the
front of the container.
CHECKING THE ENGINE
COOLANT LEVEL
Reservoir capUpper lineLower line
Park the vehicle at a level spot and look at the
see±through coolant reservoir when the engine is cool.
The coolant level is satisfactory if it is between the
upper and lower lines on the tank. If the level is low, add
ethylene±glycol type coolant.
The coolant level in the reservoir will vary with engine coolant
temperature. However, if the level is on or below the lower
line, add coolant to bring the level up to the upper line.
Use only ethylene±glycol type coolant. It will prevent
freezing and corrosion. Neither supplemental inhibitors nor
additives are needed nor recommended. (For information on
ethylene±glycol coolant, see also ªEngine coolant selectionº
described below.)
ENGINE
198If the coolant level drops within a short time after
replenishing, there may be a leak in the system. Visually
check the radiator, hoses, reservoir cap, drain cock and
water pump.
If you can find no leak, have your Lexus dealer test the cap
pressure and check for leaks in the cooling system.
CAUTION!
To prevent burning yourself, do not remove the
reservoir cap when the engine is hot.
Engine coolant selection
Your coolant must contain ethylene±glycol antifreeze. In
addition to preventing freezing and subsequent damage to
the engine, this will also prevent corrosion. Further
supplemental inhibitors or additives are neither needed nor
recommended.
Read the antifreeze container for information on freeze
protection. Follow the manufacturer's directions for how
much to mix with water. The total capacity of the cooling
system is given on page 191. We recommend 50% solution
be used for your Lexus, or a sufficient quantity to provide
protection to about ±35C (±31F).
NOTICE
Do not use alcohol type antifreeze or plain water
alone.
