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:
INTERIOR
The 2010 MKZ's redesign included many changes to the interior, which is
clean-looking and clutter-free. I liked the delicate swooshes of real wood
accenting the interior doors and the no-nonsense ...
Easy entry/exit feature
When the ignition is turned off, the column will move to the full up and
in position if this feature is activated through the message center. Refer
to Message center in the Instrument Cluster chap ...
Create a MyKey
To program MyKey on one of the keys programmed to the vehicle,
insert the key that you want to make a MyKey into the ignition. For
vehicles equipped with push button start, put the intelligent acc ...
