Buick Regal: Fuel (2.0L Turbo Engine)
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Premium Recommended Fuel
Use premium 93 octane unleaded
gasoline in your vehicle. Unleaded
gasoline with an octane rating as
low as 87 may be used, but it will
reduce performance and fuel
economy.
Fuel (3.6L Engine)
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Regular Fuel
Use only unleaded gasoline rated
87 octane or higher in your vehicle.
Do not use gasoline with an octane
rating lower as it may result in
vehicle damage and lower fuel
economy.
E85 or FlexFuel
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No E85 or FlexFuel
Gasoline-ethanol fuel blends greater
than E15 (15% ethanol by volume),
such as E85, cannot be used in this
vehicle.
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The engine oil life system calculates
engine oil life based on vehicle use
and displays the CHANGE ENGINE
OIL SOON message when it is time
to change the engine oil and filter.
The oil life system sho
SEE MORE:
Special Tools
EL-35616 Terminal Test Probe Kit
For equivalent regional tools, refer to Special Tools.
When the condition is not currently present, but is indicated in DTC history,
the cause may be intermittent.
An intermittent may also be the cause when there is a customer complaint, but
the symp
Diagnostic Instructions
Perform the Diagnostic System Check prior to using this diagnostic
procedure:Diagnostic System
Check - Vehicle
Review the description of Strategy Based Diagnosis:Strategy Based
Diagnosis
An overview of each diagnostic category can be found here:Diagnostic
Procedure