Octane recommendations

“Regular” unleaded gasoline with a pump (R+M)/2 octane rating of 87 is recommended. Some stations offer fuels posted as “Regular” with an octane rating below 87, particularly in high altitude areas. Fuels with octane levels below 87 are not recommended.

Do not be concerned if your engine sometimes knocks lightly. However, if it knocks heavily under most driving conditions while you are using fuel with the recommended octane rating, see your authorized dealer to prevent any engine damage.
See also:
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pressure warning light will turn on if the tire pre ...
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In case of a roadside emergency with a disabled vehicle (without access
to wheel dollies, car hauling trailer, or flatbed transport vehicle) your
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Lincoln MKZ Dynamic Driving Technologies
The new MKZ offers Lincoln Drive Control as standard. Lincoln Drive Control
is an automatic system that delivers an ideal balance of a smooth ride with
confident handling as it intuitively respond ...
