Seville V8-300 4.9L (1991)
Fuel: Specifications
***UPDATED BY TSB T-92-16 DATED OCTOBER 1991
ALCOHOL FUEL TYPES:
Methyl Tertiary-Butyl Ether (MTBE):
Fuel containing Methyl Tertiary-butyl Ether (MTBE) may be used, providing there is no more than 15% alcohol by volume.
Ethanol:
Fuel containing ethanol (ethyl) or grain alcohol may be used, providing there is no more than 10% ethanol alcohol by volume.
Methanol:
Fuel containing methanol (methyl) or wood alcohol may be used, providing there is no more than 5% methanol by volume. Use of fuel (gasohol)
that contains more than 5% methanol can corrode metal fuel system components and damage plastic and rubber parts.
GASOLINE:
Premium 91 octane Unleaded gasoline must be used.
In some areas premium unleaded fuel (minimum of 91 octane) may not be available. To allow the vehicles to operate with regular unleaded fuel the base
ignition timing must be retarded from 10° to 6° BTDC. Retarding the initial timing will have a small adverse effect on composite fuel economy and
performance.
Retarding timing for use with regular unleaded fuel has no effect on:
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Durability
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Engine cooling
^
Idle stability
Vehicles should be returned to proper timing when premium unleaded fuel becomes available.
