Lexus 2008 IS250 Owner's Manual page 419

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NOTICE
Notice on gasoline quality
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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 that stated here.
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Other gasohol may cause fuel system damage or vehicle performance problems.
IS250: Use of unleaded gasoline with an octane rating lower than 91 may result
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in engine knocking. Persistent knocking can lead to engine damage and should
be corrected by refueling with higher octane unleaded gasoline.
IS350: Use of unleaded gasoline with an octane rating lower than 91 may result
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in engine knocking and significantly reduced performance. 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 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.
6-1. Specifications
423
6

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