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:
Symptoms - HVAC Systems - Automatic
NOTE: The following steps must be completed before using the symptom
tables:
1. Perform the Diagnostic System Check - Vehicle before using the HVAC System
Malfunction
procedure in order to verify that all of the following are true:
There are no DTCs set.
The control modules can communicate via
DTC C0475
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
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