Buick Regal: Selecting the Right Engine Oil
Selecting the right engine oil depends on both the proper oil specification and viscosity grade.
Specification
Use full synthetic engine oils that meet the dexos1 specification.
Engine oils that have been approved by GM as meeting the dexos1 specification are marked with the dexos1 approved logo.
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Caution: Failure to use the recommended engine oil or equivalent can result in engine damage not covered by the vehicle warranty.
Viscosity Grade
Use SAE 5W-30 viscosity grade engine oil.
Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29 ВєC (-20 ВєF), an SAE 0W-30 oil may be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures.
When selecting an oil of the appropriate viscosity grade, it is recommended to select an oil of the correct specification. See "Specification" earlier in this section.
Engine Oil Additives/Engine Oil Flushes
Do not add anything to the oil. The recommended oils meeting the dexos1 specification are all that is needed for good performance and engine protection.
Engine oil system flushes are not recommended and could cause engine damage not covered by the vehicle warranty.
What to Do with Used Oil
Used engine oil contains certain elements that can be unhealthy for your skin and could even cause cancer. Do not let used oil stay on your skin for very long. Clean your skin and nails with soap and water, or a good hand cleaner. Wash or properly dispose of clothing or rags containing used engine oil. See the manufacturer's warnings about the use and disposal of oil products.
Used oil can be a threat to the environment. If you change your own oil, be sure to drain all the oil from the filter before disposal. Never dispose of oil by putting it in the trash or pouring it on the ground, into sewers, or into streams or bodies of water. Recycle it by taking it to a place that collects used oil.
READ NEXT:
Engine Oil Life System
When to Change Engine Oil
This vehicle has a computer system
that indicates when to change the
engine oil and filter. This is based
on a combination of factors which
include engine revolutions, engine
Engine Air Cleaner/Filter
When to Inspect the Engine Air
Cleaner/Filter
For intervals on changing and
inspecting the engine air cleaner/
filter.
How to Inspect the Engine Air
Cleaner/Filter
Do not start the engine or have the
Cooling System
The cooling system allows the
engine to maintain the correct
working temperature.
When it is safe to lift the hood:
2.0L L4 Turbo Engine
Engine Cooling Fan (Out
of View)
Coolant Surge Tank and
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SEE MORE:
Special Tools and Equipment
SPECIAL TOOLS
BO-38185
J-38185
Hose Clamp Pliers
GE-8800
J-43600
ACR 2000 Air
Conditioning
Service Center
GE-39400-A
J-39400-A
Halogen Leak
Detector
GE-41447
J-41447
R-134a/R123yf
A/C Tracer Dye -
Box of 24
GE-42220
J-42220
Universal 12V
Leak Detection
Lamp
GE-43872
J-43872
Fluorescent Dye
Clea
Battery - North America
The original equipment battery is
maintenance free. Do not remove
the cap and do not add fluid.
If equipped with a V6 engine, the
battery is under the trim panel on
the left side of the rear cargo area.
If equipped with an L4 engine, the
battery is under the hood. See
Engine Compartment Overview.
