CarPartSizes

Car part size lookup
by year, make, and model.

Checked oil specs by engine

2005 Buick Park Avenue oil capacity, type & filter

The 2005 Buick Park Avenue takes 4.5 qt of 5W-30 oil.

Applies to checked engine: 3.8L V6.

Capacity 4.5 qt i Based on 4 checked sources: AMSOIL Lookup, Pennzoil OATS, Valvoline Product Finder, and Castrol (Olyslager). Additional cross-check is still pending: capacity condition (service fill / with filter vs dry fill). Use it as a reference, then confirm the service-fill / with-filter amount before adding oil. See how we verify. Learn how we verify fitment
Oil type 5W-30 OEM oil approval is not source-backed on this page; confirm the bottle or owner's manual before checkout. Verified fit
Oil Filters Options cross-checked
AMSOIL Shown first EA15K29 Search EA15K29 WIX 51040 Search 51040 AMSOIL EA15K01 Search EA15K01 AMSOIL EA15K02 Search EA15K02 Purolator L10111 Search L10111 CHAMP / LUBER-FINER PH47 Search PH47 K&N HP-1001 Search HP-1001

AMSOIL EA15K29 is copied into the checkout checklist below. Other listed filters are source-backed alternatives.

8 sources checked Last checked: 2026-06-26 How we verify →

Where to Buy View Data Sources
Buy oil & filters:
Walmart → AutoZone → Amazon → O'Reilly →
Full synthetic options for 5W-30
Mobil 1 Extended Performance 5W-30 → Castrol Edge 5W-30 → Pennzoil Platinum 5W-30 →

Search paths only — confirm your OEM viscosity spec and quantity before checkout.

2005 Buick Park Avenue oil specs: capacity conditions and filter notes

Filter part numbers

All listed filter part numbers are compatible alternatives for your vehicle. Choose any one brand, then confirm the exact part number at checkout.

Verify before checkout

Retailer fitment tools may use different data. Confirm oil capacity, viscosity, and filter part number before ordering.

Source coverage for the 2005 Buick Park Avenue

Capacity sources

Supported by Pennzoil OATS, Valvoline Product Finder, AMSOIL Lookup, and Castrol (Olyslager).

Oil type sources

Supported by Pennzoil OATS, Castrol (Olyslager), Valvoline Product Finder, and CarAraC Engine Oil.

Filter sources

Supported by K&N Filters, RockAuto, Purolator Part Finder, and AMSOIL Lookup.

Source coverage

8 checked source rows for the 2005 Buick Park Avenue.

Before ordering for this 2005 Buick Park Avenue

Checkout verification checklist
3.8L V6 Buy →
Capacity
4.5 qt
Oil type
5W-30
Interval
7,800 mi / 12 mo
Filter
AMSOIL EA15K29

Source check: Last checked 2026-06-26 from AMSOIL Lookup, K&N Filters, Pennzoil OATS, Purolator Part Finder, RockAuto, Valvoline Product Finder, CarAraC Engine Oil, and Castrol (Olyslager).

Same oil specs on other 2005 Buick models

LeSabre

Buick Park Avenue oil specs by year

This table includes checked Buick Park Avenue model years available in our database.

No other published Buick Park Avenue years are available yet.

How we verified 2005 Buick Park Avenue oil data

How we verify fitment

Checked fitment data. Last checked: 2026-06-26.

This page checked 8 sources for the 2005 Buick Park Avenue. 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
Cross-check pending i Some oil fields are based on checked source data but still need stronger cross-check evidence. Review area: 3.8L V6 capacity. Use the listed values as references and confirm the exact engine before ordering or adding oil. See how we verify. Learn how we verify fitment
Sources checked
8
Last checked
2026-06-26
Field-level source support
  • Capacity: Pennzoil OATS, Valvoline Product Finder, AMSOIL Lookup, and Castrol (Olyslager)
  • Oil type: Pennzoil OATS, Castrol (Olyslager), Valvoline Product Finder, and CarAraC Engine Oil
  • Filter: K&N Filters, RockAuto, Purolator Part Finder, and AMSOIL Lookup
  • Change interval: Pennzoil OATS, Castrol (Olyslager), Valvoline Product Finder, and CarAraC Engine Oil
Source Supports Checked Link
AMSOIL Lookup Capacity, Filter 2026-06-26 Visit brand site
K&N Filters Filter 2026-06-26 Visit brand site
Pennzoil OATS Capacity, Oil type 2026-06-26 Visit brand site
Purolator Part Finder Filter 2026-06-26 Visit brand site
RockAuto Filter 2026-06-26 Checked source
Valvoline Product Finder Capacity, Oil type 2026-06-26 Checked source
CarAraC Engine Oil Oil type 2026-06-26 Checked source
Castrol (Olyslager) Capacity, Oil type 2026-06-26 Visit brand site

2005 Buick Park Avenue 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 2005 Buick Park Avenue 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 2005 Buick Park Avenue?

Castrol's service data indicates a 7,800 mi / 12 mo change interval for the 2005 Buick Park Avenue. Always follow your owner's manual and oil-life monitor. Severe service may 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.

2005 Buick Park Avenue maintenance checklist

One part checked. Look up the rest while you're here.

Where to buy

These are retailer search paths for your vehicle. The specs above are checked — use the retailer's vehicle selector at checkout to confirm before ordering.

This section may include affiliate or sponsored retailer links. They are purchase paths, not fitment evidence.

Look up another vehicle

Find checked oil capacity, type, and filter data by exact year, make, and model.

Other 2005 Buick Park Avenue lookups: Cabin air filter · Engine air filter