Buick Regal 2018-2025 Owners Manual / In Brief / Performance and Maintenance / Fuel (2.0L Turbo Engine)
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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Engine Oil Life System
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:
DTC P0231, P0232, or P023F
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptors
D
Description and Operation
WHEEL DRIVE SHAFTS DESCRIPTION AND OPERATION
Wheel drive shafts are flexible assemblies consisting of an inner joint and
an outer constant velocity joint connected
by an axle shaft. The inner joint is completely flexible, and can plunge in and
out. The outer joint is also flexible, but
cannot plun
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