Lexus GS300 1998 Owner's Manual page 375

ENGINE
Oil capacity
Drain and refill
with filter
without filter
Oil grade
Recommended oil viscosity (SAE):
– COOLING SYSTEM
Capacity
Coolant type
– FUEL
Fuel type
Octane rating
– IGNITION SYSTEM
362
5.2 L (5.5 qt., 4.6 lmp.qt.)
4.9 L (5.2 qt., 4.3 lmp.qt.)
API SH, "Energy–Conserving II" or SJ,
"Energy–Conserving" multigrade engine oil or ILSAC
multigrade engine oil
9.3 L (9.8 qt., 8.2 lmp.qt.)
Ethylene – glycol coolant (Do not use alcohol type.)
62L005–1
Only UNLEADED
91 (Research octane number 96) or higher
Temperature range anticipated before next oil change