Lexus GX 470 2009, Owner'S Manual

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6-1. Specifications
NOTICE
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Notice on fuel quality
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Do not 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 convert-
ers causing the emission control system to malfunction.
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Do not use gasohol other than that stated here.
Other gasohol may cause fuel system damage or vehicle performance problems.
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Use of unleaded gasoline with an octane rating lower than 91 may result in engine
knocking.
Persistent knocking can lead to engine damage and should be corrected by refu-
eling with higher octane unleaded gasoline.
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Fuel-related poor driveability
If after using a different type of fuel, poor driveability is encountered (poor hot start-
ing, vaporization, engine knocking, etc.), discontinue the use of that type of fuel.
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When refueling with gasohole
Take care not to spill gasohol. It can damage your vehicle’s paint.