Operation CHARM: Car repair manuals for everyone.

Precautions For Fuel

Use premium unleaded gasoline with an octane rating of at least 87 AKI (Anti-Knock Index) number (research octane number 91).

CAUTION: Using a fuel other than that specified could adversely affect the emission control devices and systems, and could also affect warranty coverage.
Under no circumstances should a leaded gasoline be used, since this will damage the three way catalyst.