Checked oil specs by engine
2018 Toyota Prius Prime oil capacity, type & filter
The 2018 Toyota Prius Prime takes 4.4 qt of 0W-20 oil.
Applies to checked engine: 1.8L 4-Cyl. Also check 2018 Toyota Prius .
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.
2018 Toyota Prius Prime oil specs: capacity conditions and filter notes
All listed filter part numbers are compatible alternatives for your vehicle. Choose any one brand, then confirm the exact part number at checkout.
Retailer fitment tools may use different data. Confirm oil capacity, viscosity, and filter part number before ordering.
Source coverage for the 2018 Toyota Prius Prime
Supported by Pennzoil OATS and AMSOIL Lookup.
Supported by Pennzoil OATS and AMSOIL Lookup.
Supported by K&N Filters, RockAuto, Purolator Part Finder, and AMSOIL Lookup.
5 checked source rows for the 2018 Toyota Prius Prime.
Before ordering for this 2018 Toyota Prius Prime
- Capacity
- 4.4 qt
- Oil type
- 0W-20
- Filter
- AMSOIL EA15K01
Source check: Last checked 2026-06-23 from AMSOIL Lookup, K&N Filters, Pennzoil OATS, RockAuto, and Purolator Part Finder.
Toyota Prius Prime oil specs by year
This table includes checked Toyota Prius Prime model years available in our database.
| Year | Capacity | Oil type | Filter |
|---|---|---|---|
| 2024 | 4.4 qt | 0W-16 | AMSOIL EA15K09 |
| 2023 | 4.4 qt | 0W-16 | AMSOIL EA15K09 |
| 2022 | 4.4 qt | 0W-16 | PRO-TEC PXL51394 |
| 2021 | 4.4 qt | 0W-16 | AMSOIL EA15K01 |
| 2020 | 5 qt | 0W-16 | AMSOIL EA15K01 |
| 2019 | 4.4 qt | 0W-20 | AMSOIL EA15K01 |
| 2018 Current page | 4.4 qt | 0W-20 | AMSOIL EA15K01 |
How we verified 2018 Toyota Prius Prime oil data
How we verify fitmentChecked fitment data. Last checked: 2026-06-23.
This page checked 5 sources for the 2018 Toyota Prius Prime. 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
- 2026-06-23
- Capacity: Pennzoil OATS and AMSOIL Lookup
- Oil type: Pennzoil OATS and AMSOIL Lookup
- Filter: K&N Filters, RockAuto, Purolator Part Finder, and AMSOIL Lookup
| Source | Supports | Checked | Link |
|---|---|---|---|
| AMSOIL Lookup | Capacity, Oil type, Filter | 2026-06-23 | Visit brand site |
| K&N Filters | Filter | 2026-06-23 | Visit brand site |
| Pennzoil OATS | Capacity, Oil type | 2026-06-23 | Visit brand site |
| RockAuto | Filter | 2026-06-23 | Checked source |
| Purolator Part Finder | Filter | 2026-06-23 | Visit brand site |
2018 Toyota Prius Prime oil FAQ
Is the oil capacity measured with or without the filter?
Capacity condition matters. With filter includes a new filter. Service fill is the typical drain-and-fill amount. Dry fill is for a fresh empty engine only.
Why should I confirm before buying?
Retailer catalogs can update separately. Confirm the exact 2018 Toyota Prius Prime selector at checkout before you buy.
Do I also need to match the OEM oil approval?
Yes. Viscosity is only one part of the oil spec. Match the oil approval listed in your owner's manual or on the bottle before checkout.
How often should I change the oil on a 2018 Toyota Prius Prime?
Use the oil-life monitor or the interval in your owner's manual for this engine. Severe service can require a shorter interval.
Do I need a new drain plug gasket?
Replace it when your vehicle uses a serviceable gasket or crush washer. Confirm the gasket size and drain plug torque from the service manual or parts counter.
2018 Toyota Prius Prime 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 Toyota Prius Prime. Confirm capacity, viscosity, and filter part number before checkout.
Search 2018 Toyota Prius Prime oil & filter →AutoZone
Use AutoZone's vehicle selector for the 2018 Toyota Prius Prime before checkout to confirm oil capacity, viscosity, and filter fitment.
Search 2018 Toyota Prius Prime oil & filter →Amazon
Search Amazon listings for the 2018 Toyota Prius Prime and check listing fitment notes against the specs above.
Search 2018 Toyota Prius Prime oil & filter →O'Reilly
Open O'Reilly's fitment search for the 2018 Toyota Prius Prime and verify oil capacity, viscosity, and filter part number before ordering.
Search 2018 Toyota Prius Prime oil & filter →Look up another vehicle
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