Checked oil specs by engine
2018 GMC Sierra oil capacity, type & filter
The 2018 GMC Sierra takes 6 qt of 5W-30 (4.3L V6) and 8 qt of 0W-20 (5.3L V8 Hybrid) and 8 qt of 0W-20 (6.2L V8) and 6 qt of 5W-30 (6.0L V8) and 10 qt of 5W-40 (6.6L V8 Diesel). Select your engine below before buying.
| Engine | Capacity | Oil Type | Filter |
|---|---|---|---|
| 4.3L V6 | 6 qt | 5W-30 | AMSOIL EA15K01 |
| 5.3L V8 Hybrid | 8 qt | 0W-20 | AMSOIL EA15K01 |
| 6.2L V8 | 8 qt | 0W-20 | AMSOIL EA15K01 |
| 6.0L V8 | 6 qt | 5W-30 | — |
| 6.6L V8 Diesel | 10 qt | 5W-40 | — |
Match one of 5 checked engine options before buying oil or a filter. Also check 2018 GMC Sierra 1500, 2018 GMC Sierra 2500 HD, 2018 GMC Sierra 3500 HD .
AMSOIL EA15K01 is copied into the checkout checklist below. Other listed filters are source-backed alternatives.
AMSOIL EA15K01 is copied into the checkout checklist below. Other listed filters are source-backed alternatives.
AMSOIL EA15K01 is copied into the checkout checklist below. Other listed filters are source-backed alternatives.
Search paths only — confirm your OEM viscosity spec and quantity before checkout.
Search paths only — confirm your OEM viscosity spec and quantity before checkout.
Search paths only — confirm your OEM viscosity spec and quantity before checkout.
2018 GMC Sierra oil specs: capacity conditions and filter notes
Check the door jamb sticker, owner's manual, or displacement badge on the engine cover. Match it to the engine options listed above before buying oil or a filter.
All listed filter part numbers are compatible alternatives for your vehicle. Choose any one brand, then confirm the exact part number at checkout.
With filter means the volume includes a new filter. Service fill is the typical drain-and-fill amount. Dry fill is for a fresh empty engine only.
Filter fitment has not been fully verified for every engine listed. Confirm the part number with the retailer before ordering.
Retailer fitment tools may use different data. Confirm oil capacity, viscosity, and filter part number before ordering.
Source coverage for the 2018 GMC Sierra
Supported by Pennzoil OATS, Valvoline Product Finder, AMSOIL Lookup, and Castrol (Olyslager).
Supported by Pennzoil OATS, AMSOIL Lookup, Valvoline Product Finder, and Castrol (Olyslager).
Supported by Purolator Part Finder and AMSOIL Lookup.
5 checked source rows for the 2018 GMC Sierra.
Before ordering for this 2018 GMC Sierra
- Capacity
- 6 qt
- Oil type
- 5W-30
- Interval
- 7,500 mi / 12 mo
- Filter
- AMSOIL EA15K01
- Capacity
- 8 qt
- Oil type
- 0W-20
- Interval
- 7,500 mi / 12 mo
- Filter
- AMSOIL EA15K01
- Capacity
- 8 qt (Service fill)
- Oil type
- 0W-20
- Interval
- 7,500 mi / 12 mo
- Filter
- AMSOIL EA15K01
- Capacity
- 6 qt
- Oil type
- 5W-30
- Interval
- 7,500 mi / 12 mo
- Filter
- Unverified
- Capacity
- 10 qt
- Oil type
- 5W-40
- Interval
- 7,500 mi / 12 mo
- Filter
- Unverified
Source check: Last checked 2026-06-27 from Purolator Part Finder, Pennzoil OATS, AMSOIL Lookup, Valvoline Product Finder, and Castrol (Olyslager).
GMC Sierra oil specs by year
This table includes checked GMC Sierra model years available in our database.
| Year | Capacity | Oil type | Filter |
|---|---|---|---|
| 2024 | 8 qt (multiple engines) | 0W-20 | AMSOIL EA15K01 |
| 2023 | 6 qt (multiple engines) | 5W-30 | WIX 51032 |
| 2022 | 6 qt (multiple engines) | 5W-30 | WIX 51032 |
| 2021 | 6 qt (multiple engines) | 5W-30 | WIX 51032 |
| 2020 | 6 qt (multiple engines) | 5W-30 | WIX 51032 |
| 2019 | 8 qt (multiple engines) | 0W-20 | AMSOIL EA15K01 |
| 2018 Current page | 6 qt (multiple engines) | 5W-30 | AMSOIL EA15K01 |
| 2017 | 6 qt (multiple engines) | 5W-30 | AMSOIL EA15K01 |
| 2016 | 6 qt (multiple engines) | 5W-30 | AMSOIL EA15K01 |
| 2015 | 6 qt (multiple engines) | 5W-30 | AMSOIL EA15K01 |
| 2014 | 6 qt (multiple engines) | 5W-30 | WIX 51027 |
| 2013 | 6 qt (multiple engines) | 5W-30 | WIX 51032 |
| 2012 | 4.5 qt (multiple engines) | 5W-30 | AMSOIL EA15K29 |
| 2011 | 4.5 qt (multiple engines) | 5W-30 | AMSOIL EA15K29 |
| 2010 | 4.5 qt (multiple engines) | 10W-30 | AMSOIL EA15K29 |
| 2009 | 6 qt (multiple engines) | 5W-30 | AMSOIL EA15K50 |
| 2008 | 4.5 qt (multiple engines) | 5W-30 | AMSOIL EA15K29 |
| 2007 | 4.5 qt (multiple engines) | 5W-30 | AMSOIL EA15K29 |
How we verified 2018 GMC Sierra oil data
How we verify fitmentChecked fitment data. Last checked: 2026-06-27.
This page checked 5 sources for the 2018 GMC Sierra. The table lists which checked source contributed capacity, oil type, or filter evidence.
We checked leading oil brands and aftermarket filter catalogs so you don't have to.
- Confidence
- Verified fit
- Sources checked
- 5
- Last checked
- 2026-06-27
- Capacity: Pennzoil OATS, Valvoline Product Finder, AMSOIL Lookup, and Castrol (Olyslager)
- Oil type: Pennzoil OATS, AMSOIL Lookup, Valvoline Product Finder, and Castrol (Olyslager)
- Filter: Purolator Part Finder and AMSOIL Lookup
- Change interval: Pennzoil OATS, AMSOIL Lookup, Valvoline Product Finder, and Castrol (Olyslager)
| Source | Supports | Checked | Link |
|---|---|---|---|
| Purolator Part Finder | Filter | 2026-06-27 | Visit brand site |
| Pennzoil OATS | Capacity, Oil type | 2026-06-27 | Visit brand site |
| AMSOIL Lookup | Capacity, Filter, Oil type | 2026-06-27 | Visit brand site |
| Valvoline Product Finder | Capacity, Oil type | 2026-06-27 | Checked source |
| Castrol (Olyslager) | Capacity, Oil type | 2026-06-27 | Visit brand site |
2018 GMC Sierra maintenance checklist
One part checked. Look up the rest while you're here.
Where to buy
These are retailer search paths for your vehicle's oil and filter specs. Verify final fitment at checkout.
This section may include affiliate or sponsored retailer links. They are purchase paths, not fitment evidence.
Walmart
Compare oil and filter listings for the 2018 GMC Sierra. Confirm capacity, viscosity, and filter part number before checkout.
Search 2018 GMC Sierra oil & filter →AutoZone
Use AutoZone's vehicle selector for the 2018 GMC Sierra before checkout to confirm oil capacity, viscosity, and filter fitment.
Search 2018 GMC Sierra oil & filter →Amazon
Search Amazon listings for the 2018 GMC Sierra and check listing fitment notes against the specs above.
Search 2018 GMC Sierra oil & filter →O'Reilly
Open O'Reilly's fitment search for the 2018 GMC Sierra and verify oil capacity, viscosity, and filter part number before ordering.
Search 2018 GMC Sierra oil & filter →Look up another vehicle
Find checked oil capacity, type, and filter data by exact year, make, and model.