Toyota Sequoia guide, Manual

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8-1. Specifications
SEQUOIA_OM_USA_OM0C011U
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Non-recommendation of the use of blended gasoline (Flex-fuel engine)
Do not use non-specified fuel such as the following.
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Fuels containing methanol
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Fuels with more than 85% ethanol
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Non-recommendation of the use of gasoline containing MMT
Some gasoline contains an octane enhancing additive called MMT (Methylcy-
clopentadienyl Manganese Tricarbonyl).
Toyota does not recommend the use of gasoline that contains MMT. If fuel
containing MMT is used, your emission control system may be adversely
affected.
The malfunction indicator lamp on the instrument cluster may come on. If this
happens, contact your Toyota dealer for service.
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Non-recommendation of the use of after-market fuel additives
(Flex-fuel engine)
Do not use any after-market fuel additives when repeatedly refueling with
E85, as some after-market fuel additives are not compatible with E85.
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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 accelerat-
ing or driving uphill. This is normal and there is no need for concern.