Lexus RC F 2015 Owner's Manual page 609

Engine oil selection (RC F)
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"Toyota Genuine Motor Oil" is used in your Lexus vehicle. Use Lexus
approved "Toyota Genuine Motor Oil" or equivalent to satisfy the following
grade and viscosity.
Oil grade: ILSAC GF-5 multigrade engine oil
Recommended viscosity: SAE 5W-30
SAE 5W-30 is the best choice for
good fuel economy and good start-
ing in cold weather.
If SAE 5W-30 is not available, SAE
10W-30 oil may be used. However,
it must be replaced with SAE 5W-
30 at the next oil change.
Oil viscosity (5W-30 is explained here as an example):
• The 5W in 5W-30 indicates the characteristic of the oil which allows cold
startability. Oils with a lower value before the W allow for easier starting of
the engine in cold weather.
• The 30 in 5W-30 indicates the viscosity characteristic of the oil when the
oil is at high temperature. An oil with a higher viscosity (one with a higher
value) may be better suited if the vehicle is operated at high speeds, or
under extreme load conditions.
How to read oil container label:
The International Lubricant Specifi-
cation Advisory
(ILSAC) Certification Mark is added
to some oil containers to help you
select the oil you should use.
RC350/RCF_U (OM24636U)
9-1. Specifications
Outside temperature
Committee
I n f o r ma t i o n P r o v i d e d b y :
609
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