Buick Regal 2018-2026 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:
Cooling Fan Description and Operation
System Overview
The engine cooling fan system consists of 2 electric cooling fans and 3 fan
relays. The cooling fan relays
are arranged in a series/parallel (S/P) configuration. This allows the engine
control module (ECM) to
operate both fans together at low or high speeds using 2 fan control circ
Phone Projection Malfunction (Apple Carplay)
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.
Refer to Diagnostic Procedure Instructions for an overview of each
diagnostic category.
Circuit/Syste
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