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:
Air Conditioning
(Air Conditioning): Press to turn
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Quiet tuning
Buick Verano delivers the library-quiet driving experience for which Buicks
have become known. Quiet-tuning systems, processes and components are built into
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