TOYOTA 2012 Yaris Hatchback - Manual (Page 332)

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6-1. Specifications
6
Vehicl
e sp
ecification
s
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If your engine knocks
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Consult your Toyota dealer.
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You may occasionally notice light knocking for a short time while acceler-
ating or driving uphill. This is normal and there is no need for concern.
NOTICE
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Notice on fuel quality
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Do not use improper fuels. If improper fuels are used, the engine will be
damaged.
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Do not use leaded gasoline.
Leaded gasoline can cause damage to your vehicle’s three-way catalytic
converters causing the emission control system to malfunction.
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Do not use gasohol other than the type previously stated.
Other gasohol may cause fuel system damage or vehicle performance
problems.
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Using unleaded gasoline with an octane number or rating lower than the
level previously stated will cause persistent heavy knocking.
At worst, this will lead to engine damage.
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Fuel-related poor driveability
If poor driveability is encountered after using a different type of fuel (poor hot
starting, vaporization, engine knocking, etc.), discontinue the use of that type
of fuel.
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When refueling with gasohol
Take care not to spill gasohol. It can damage your vehicle’s paint.