Sable V6-183 3.0L DOHC VIN S MFI (1997)
Fuel: Specifications
Vehicles are designed to use regular unleaded fuel with an octane rating of 87. At service stations, the octane rating is displayed in a label on the pumps.
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Vehicles always use a fuel with an octane rating of 87, even if it is sold as a midgrade or premium.
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In some regions, regular grade fuels are sold with octane ratings of 86 or lower and premium grade fuels are sold with octane ratings of less than
91. This is commonplace in areas of high altitude.
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Using a fuel with a lower octane rating can cause persistent and heavy knocking, which can damage the engine. It is not recommended to use such
fuels.
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Do not be concerned if the engine sometimes knocks lightly when you drive up a hill or when accelerating. Service may be required if, when using
a fuel with the specified octane rating:
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engine knocks heavily under all driving conditions.
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engine knocks lightly while you drive at cruising speed on level roads.
It is not recommended, nor is it necessary in most cases, to use a premium grade of fuel with an octane rating of higher than 87 in vehicles.
If the engine has difficulty starting, rough engine idle or hesitation when the engine is cold, it may be caused by fuel with low volatility.
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Trying a different grade or brand of fuel may solve the condition.
