Toyota Avalon Hybrid 2018 Owner's Manual page 440

440
8-1. Specifications
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Engine oil selection
"Toyota Genuine Motor Oil" is used in your Toyota vehicle. Use
Toyota 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 0W-20
SAE 0W-20 is the best choice
for good fuel economy and
good starting in cold weather.
If SAE 0W-20 is not available,
SAE 5W-20 oil may be used.
However, it must be replaced
with SAE 0W-20 at the next oil
Outside temperature
change.
How to read oil container label
The International Lubricant
Specification Advisory Commit-
tee (ILSAC) Certification Mark
is added to some oil containers
to help you select the oil you
should use.