Lexus GS350 Owner's Manual page 385

Adding engine oil
■
If the oil level is below or near the low level mark, add engine oil of the same
type as that already in the engine.
GS350

GS F

Make sure to check the oil type and prepare the items needed before adding
oil.
Engine oil selection
Oil quantity (Low → Full)
Items
Remove the oil filler cap by turning it counterclockwise.
1
Add engine oil slowly, checking the dipstick.
2
Install the oil filler cap by turning it clockwise.
3
GS350_300_GS F_OM_OM30G34U_(U)
6-3. Do-it-yourself maintenance
GS300

→P. 522, 524
1.6 qt. (1.5 L, 1.3 Imp.qt.)
Clean funnel
383
6