Buick Envista 2025 - Recommended Fuel; Top Tier Fuel

Buick Envista Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-18181221) - 2025
Driving and Operating 181
Additionally, there may be three beeps on the
r
ight or left, depending on the lane departure
direction.
Take Steering
The LKA system does not continuously steer
the vehicle. If LKA does not detect active
driver steering, an alert, chime, or DIC message
may be provided. Move the steering wheel
to dismiss.
When the System Does Not Seem to
Work Properly
The system performance may be affected by:
•
Close vehicles ahead.
•
Sudden lighting changes, such as when
driving through tunnels.
•
Banked roads.
•
Roads with poor lane markings, such as
two-lane roads.
If the LKA system is not functioning properly
when lane markings are clearly visible,
cleaning the windshield may help.
A system unavailable message may display if
the camera is blocked. The LKA system does not
need service.
LKA assistance and/or LDW alerts may
o
ccur due to tar marks, shadows, cracks in
the road, temporary or construction lane
markings, or other road imperfections. This
is normal system operation; the vehicle does
not need service. Turn LKA off if these
conditions continue.
Fuel
Top Tier Fuel
GM recommends the use of TOP TIER Detergent
Gasoline to keep the engine clean, reduce
engine deposits, and maintain optimal vehicle
performance. Look for the TOP TIER Logo
or see www.toptiergas.com for alist of
TOP TIER Detergent Gasoline marketers and
applicable countries.
Recommended Fuel
Regular unleaded gasoline meeting ASTM
s
pecification D4814 with a posted octane rating
(R+M)/2 of 87 or greater is recommended.
Do not use gasoline with aposted octane
rating of less than 87, as this will result in
reduced performance and driveability. If heavy
knocking is heard when using gasoline rated at
87 or greater, the engine needs service.