Gasoline Octane
Use regular unleaded gasoline with a posted octane rating of 87 or higher. If the octane rating is less than 87, you may notice an audible knocking noise when you drive, commonly referred to as spark knock. If this occurs, use a gasoline rated at 87 octane or higher as soon as possible.
If you are using gasoline rated at 87 octane or higher and you hear heavy knocking, your engine needs service.
See also:
Brake Adjustment
Every time the brakes are applied,
with or without the vehicle moving,
the brakes adjust for wear. ...
QuietTuned for silent ride, comfort
Like all other Buick models, Terraza benefits from QuietTuning, a
comprehensive engineering program throughout the entire vehicle to ensure a
silent ride. This includes new engine isolation measur ...
Safety Belt Extender
If the vehicle’s safety belt will fasten around you,
you should use it.
But if a safety belt is not long enough, your dealer
will order you an extender. When you go in to
order it, take the he ...