Lexus SC 430 2006 Owner's Manual page 212

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Adding engine oil
Make sure to check the oil type and prepare the items needed before
adding.
Oil grade
Items
Remove the oil filler cap.
Add engine oil slowly, checking the dipstick.
Return the filler cap and turn the cap clockwise until you hear a
click.
It takes about 1.6 qt. (1.5 L, 1.3 lmp.qt.) to raise the oil level from low to full
on the dipstick.
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Recommended viscosity
Temperature range anticipated before next oil change.
ILSAC multigrade engine oil.
Clean funnel (only for adding oil)
4-3. Do-it-yourself maintenance
If the oil level is below or near the
low line, add engine oil of the same
type as already in the engine.
SAE 5W-30 is the best choice for
good fuel economy, and good
starting in cold weather.
If SAE 5W-30 is not available, SAE
10W-30 may be used. However, it
should be replaced with 5W-30 at
the next oil change.
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