Toyota 2009 Yaris Hatchback Owner's Manual page 364

NOTICE
n Notice on fuel quality
Do not use improper fuels. If improper fuels are used the engine will be
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damaged.
Do not use leaded gasoline.
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Leaded gasoline can cause damage to your vehicle's three-way catalytic
converters causing the emission control system to malfunction.
Do not use gasohol other than that stated here.
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Other gasohol may cause fuel system damage or vehicle performance
problems.
Use of unleaded gasoline with an octane rating lower than 87 may result in
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engine knocking. Persistent knocking can lead to engine damage and
should be corrected by refueling with higher octane unleaded gasoline.
Fuel-related poor driveability
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If after using a different type of fuel, poor driveability is encountered (poor
hot starting, vaporization, engine knocking, etc.), discontinue the use of that
type of fuel.
When refueling with gasohol
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Take care not to spill gasohol.
It can damage your vehicle's paint.
6-1. Specifications
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