Octane recommendations

Octane recommendations  - What you should know about automotive fuels - Maintenance and Specifications - Lincoln MKX Owners Manual - Lincoln MKX

“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

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:

    Guarding against exhaust fumes
    WARNING: If you smell exhaust fumes inside your vehicle, have your dealer inspect your vehicle immediately. Do not drive if you smell exhaust fumes. Carbon monoxide is present in exhaust fumes. T ...

    Stopping and securing the vehicle
    1. Park on a level surface, set the parking brake and activate the hazard flashers. 2. Place the gearshift lever in P (Park) and turn the engine off. ...

    Engine data
    ...