Checked oil specs by engine
2020 Subaru Ascent oil capacity, type & filter
The 2020 Subaru Ascent takes 5.9 qt of 0W-20 oil. Supported by 7 checked sources.
Applies to checked engine: 2.4L 4-Cyl Turbo.
PRO-TEC PXL57055 is copied into the checkout checklist as the first source-backed candidate for the 2.4L 4-Cyl Turbo. 6 other candidate numbers are kept for cross-checking; confirm the exact filter in the retailer selector before buying.
Oil specs changed across adjacent model years (2019 and 2021) compared with this 2020 page — confirm this is the correct model year before ordering.
Search paths only — confirm the bottle matches your viscosity, API/OEM approval requirements, and purchase quantity before checkout.
2020 Subaru Ascent oil specs: capacity conditions and filter notes
The filter part numbers listed above come from checked source rows for this vehicle and engine. Use them as candidates, then confirm the exact part number at checkout; do not substitute across engine rows.
Retailer fitment tools may use different data. Confirm oil capacity, viscosity, and filter part number before ordering.
Quick reference for this 2020 Subaru Ascent
- Capacity
- 5.9 qt
- Oil type
- 0W-20
- Interval
- 6,000 mi / 6 mo
- Filter
- PRO-TEC PXL57055
Source check: Last checked 2026-06-27 from Pennzoil oil application database, AMSOIL fitment lookup, RockAuto parts catalog, K&N Filters, Purolator fitment catalog, Valvoline Product Finder, and Castrol fitment database.
Subaru Ascent oil specs by year
The 2020 page is the sixth-newest Ascent oil record. Oil specs changed in the 2021 and 2019 model years — confirm you are on the correct year before buying oil or a filter.
| Year | Capacity | Oil type | Filter |
|---|---|---|---|
| 2025 | 4.8 qt | 0W-20 | PRO-TEC PXL57055 |
| 2024 | 4.8 qt | 0W-20 | PRO-TEC PXL57055 |
| 2023 | 4.8 qt | 0W-20 | PRO-TEC PXL57055 |
| 2022 | 5.9 qt | 0W-20 | AMSOIL EA15K13 |
| 2021 | 4.8 qt | 0W-20 | PRO-TEC PXL57055 |
| 2020 Current page | 5.9 qt | 0W-20 | PRO-TEC PXL57055 |
| 2019 | 4.8 qt | 0W-20 | PRO-TEC PXL57055 |
How we verified 2020 Subaru Ascent oil data
How we verify fitmentChecked fitment data. Last checked: 2026-06-27.
This page checked 7 sources for the 2020 Subaru Ascent. Capacity: Valvoline Product Finder; oil type: Pennzoil oil application database, Valvoline Product Finder, AMSOIL fitment lookup, and Castrol fitment database; filter: Purolator fitment catalog, AMSOIL fitment lookup, RockAuto parts catalog, and K&N Filters.
- Confidence
- Cross-check pending
- Sources checked
- 7
- Last checked
- 2026-06-27
- Capacity: Valvoline Product Finder
- Oil type: Pennzoil oil application database, Valvoline Product Finder, AMSOIL fitment lookup, and Castrol fitment database
- OEM oil spec: Not source-backed on this page
- Filter: Purolator fitment catalog, AMSOIL fitment lookup, RockAuto parts catalog, and K&N Filters
- Change interval: Castrol fitment database
| Source | Supports | Checked | Link |
|---|---|---|---|
| Pennzoil oil application database | Oil type | 2026-06-27 | Visit brand site |
| AMSOIL fitment lookup | Oil type, Filter | 2026-06-27 | Visit brand site |
| RockAuto parts catalog | Filter | 2026-06-27 | Checked source |
| K&N Filters | Filter | 2026-06-27 | Visit brand site |
| Purolator fitment catalog | Filter | 2026-06-27 | Visit brand site |
| Valvoline Product Finder | Capacity, Oil type | 2026-06-27 | Checked source |
| Castrol fitment database | Oil type, Change interval | 2026-06-27 | Visit brand site |
2020 Subaru Ascent oil questions that affect checkout
How often should I change the oil on a 2020 Subaru Ascent?
Castrol's service data indicates a 6,000 mi / 6 mo change interval for the 2020 Subaru Ascent. Your actual service need depends on driving conditions and the oil-life monitor reading. Always confirm against your owner's manual; severe-duty cycles may shorten the interval.
2020 Subaru Ascent oil — questions before buying
- Can I use 5W-20 or 5W-30 instead of 0W-20 in my 2020 Subaru Ascent?
- The checked source rows on this page list 0W-20 for the 2020 Subaru Ascent. Use 0W-20 unless your owner's manual, oil cap, or service information for your exact engine allows another grade. If a retailer suggests 5W-20 or 5W-30, match the engine row first and confirm the grade before buying.
2020 Subaru Ascent maintenance checklist
One part checked. Look up the rest while you're here.
Where to buy
These are retailer search paths for listed specs on this page. Use the retailer's vehicle selector at checkout to confirm before ordering.
This section may include affiliate or sponsored retailer links. They are search paths, not fitment evidence.
Walmart
Search Walmart for 2020 Subaru Ascent oil and filter, then match the listing specs against the capacity and viscosity shown above before adding to cart.
Search 2020 Subaru Ascent oil & filter →AutoZone
Use AutoZone's vehicle selector for the 2020 Subaru Ascent to confirm oil capacity, viscosity, and filter fitment before checkout.
Search 2020 Subaru Ascent oil & filter →Amazon
Search Amazon for the 2020 Subaru Ascent oil and filter and verify the listing's engine fit note matches your engine before ordering.
Search 2020 Subaru Ascent oil & filter →O'Reilly
Open O'Reilly's fitment search for the 2020 Subaru Ascent oil and filter and cross-check capacity, viscosity, and filter part number against the specs above.
Search 2020 Subaru Ascent oil & filter →Look up another vehicle
Find checked oil capacity, type, and filter data by exact year, make, and model.