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2020 Mercedes-Benz GLS450 oil capacity, type & filter

The 2020 Mercedes-Benz GLS450 takes 9 qt of 0W-30 oil.

Applies to checked engine: 3.0L 6-Cyl Turbo.

Capacity 9 qt i Based on 1 checked source: Pennzoil OATS. Additional cross-check is still pending: a second checked capacity source and 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 0W-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
Purolator Shown first PL41505 Search PL41505 HENGST E159HD311 Search E159HD311

Purolator PL41505 is copied into the checkout checklist below. Other listed filters are source-backed alternatives.

4 sources checked Last checked: 2026-06-27 How we verify →

Where to Buy View Data Sources
Buy oil & filters:
Walmart → AutoZone → Amazon → O'Reilly →

2020 Mercedes-Benz GLS450 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 2020 Mercedes-Benz GLS450

Capacity sources

Supported by Pennzoil OATS.

Oil type sources

Supported by Pennzoil OATS and AMSOIL Lookup.

Filter sources

Supported by Purolator Part Finder and RockAuto.

Source coverage

4 checked source rows for the 2020 Mercedes-Benz GLS450.

Before ordering for this 2020 Mercedes-Benz GLS450

Checkout verification checklist
3.0L 6-Cyl Turbo Buy →
Capacity
9 qt
Oil type
0W-30
Filter
Purolator PL41505

Source check: Last checked 2026-06-27 from AMSOIL Lookup, Pennzoil OATS, Purolator Part Finder, and RockAuto.

Mercedes-Benz GLS450 oil specs by year

This table includes checked Mercedes-Benz GLS450 model years available in our database.

Year Capacity Oil type Filter
2025 9 qt 0W-20 AMSOIL 51460176
2024 9 qt 0W-20 AMSOIL 51446448
2020 Current page 9 qt 0W-30 Purolator PL41505

How we verified 2020 Mercedes-Benz GLS450 oil data

How we verify fitment

Checked fitment data. Last checked: 2026-06-27.

This page checked 4 sources for the 2020 Mercedes-Benz GLS450. 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: 3.0L 6-Cyl Turbo 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
4
Last checked
2026-06-27
Field-level source support
  • Capacity: Pennzoil OATS
  • Oil type: Pennzoil OATS and AMSOIL Lookup
  • Filter: Purolator Part Finder and RockAuto
Source Supports Checked Link
AMSOIL Lookup Oil type 2026-06-27 Visit brand site
Pennzoil OATS Capacity, Oil type 2026-06-27 Visit brand site
Purolator Part Finder Filter 2026-06-27 Visit brand site
RockAuto Filter 2026-06-27 Checked source

2020 Mercedes-Benz GLS450 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 2020 Mercedes-Benz GLS450 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 2020 Mercedes-Benz GLS450?

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.

2020 Mercedes-Benz GLS450 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.

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