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:
Erasing the function button codes
Note: You cannot erase individual
buttons.
1. Press and hold the outer two
function buttons simultaneously for
approximately 20 seconds until the
LED lamps above the buttons flash
rapid ...
Features & Pricing
Lincoln continues to add a lot of features standard across its lineup, but
when it comes to pricing, the MKX still costs slightly more than a similarly
equipped Lexus RX.
Lincoln does, however, ...
Vehicle storage
If you plan on storing your vehicle for an extended period of time
(30 days or more), refer to the following maintenance recommendations
to ensure your vehicle stays in good operating condition.
...
