If Your Engine Knocks; Notice On Fuel Quality; Fuel-Related Poor Driveability; When Refueling With Gasohol - Lexus GS450h Owner's Manual

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8-1. Specifications

If your engine knocks

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Consult your Lexus dealer.
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You may occasionally notice light knocking for a short time while accelerating or
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driving uphill. This is normal and there is no need for concern.
NOTICE

Notice on fuel quality

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Do not use improper fuels. If improper fuels are used, the engine will be dam-
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aged.
Do not use leaded gasoline.
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Leaded gasoline can cause damage to your vehicle' s three-way catalytic convert-
ers causing the emission control system to malfunction.
Do not use gasohol other than the type previously stated.
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Other gasohol may cause fuel system damage or vehicle performance problems.
Using unleaded gasoline with an octane number or rating lower than the level
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previously stated will cause persistent heavy knocking.
At worst, this will lead to engine damage.

Fuel-related poor driveability

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If poor driveability is encountered after using a different type of fuel (poor hot start-
ing, 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.
GS450h_OM_OM30E26U_(U)