ENGINE
175
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. “Energy-Conserving II”, shown
in the lower portion, indicates that the oil has fuel-saving
capabilities. Oils marked “Energy-Conserving II” will have
higher fuel-saving capabilities than oils marked
“Energy-Conserving”.
The ILSAC (International Lubricant Standardization and
Approval Committee) Certification Mark is displayed on the
front of the container.
CHECKING THE ENGINE COOLANT
LEVEL
“FULL” line
“LOW” line
Look at the see-through coolant reservoir. The coolant
level is satisfactory if it is between the “FULL” and “LOW”
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 “LOW”
line, add coolant to bring the level up to the “FULL” line.
Use only ethylene-glycol type coolant. For information on
ethylene-glycol coolant, see also “Engine coolant selection”
described below.
ENGINE
176If the coolant level drops within a short time after replenishing,
there may be a leak in the system. Visually check the radiator,
hoses, radiator 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 radiator
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 169. 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.
