2018 Buick RegalOil Type & Capacity

OEM spec from the factory service manual for the Base variant.

Quick Answer

Oil Type

$API - SAE 5W-30 Full Synthetic Engine Oil

Capacity (w/ Filter)

5.00 QTS.

4.73 L

Variant

Base

Note: Engine oil meeting the dexos1 specification of the proper SAE viscosity grade. ACDelco dexos1 full synthetic is recommended. In an area of extreme cold, where the temperature falls below -29Deg.C (-20Deg.F), 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.

This vehicle's factory manual

2018 Buick Regal: confirm the engine, trim, or drivetrain to open the available repair and diagnosis sections.

Open this vehicle’s service manual
Sister site: See this spec on WhatTypeOfOil.com — our quick oil type & capacity lookup for every vehicle.
Other specs:All specs

What You'll Need

Engine Oil

$API - SAE 5W-30 Full Synthetic Engine Oil for Buick Regal

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Oil Filter

Buick Regal Oil Filter

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Tool

Oil Filter Wrench

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Kit

Funnel + Drain Pan Kit

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Frequently Asked Questions

What type of oil does a 2018 Buick Regal take?
The 2018 Buick Regal requires API - SAE 5W-30 Full Synthetic Engine Oil. The exact spec may vary slightly by engine variant — this page shows the OEM recommendation for the Base configuration.
How much oil does a 2018 Buick Regal need?
The 2018 Buick Regal takes 5.00 QTS. (4.73 L) of engine oil with the filter replaced.
Can I use synthetic oil in my 2018 Buick Regal?
Yes — synthetic oil that meets the API - SAE 5W-30 Full Synthetic Engine Oil specification is acceptable and often preferred for better protection and longer change intervals.
What happens if I use the wrong oil in my 2018 Buick Regal?
Using oil that does not meet the API - SAE 5W-30 Full Synthetic Engine Oil specification can reduce engine protection, increase wear, and potentially void warranty coverage. Always use oil that meets the OEM spec.