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2018 BMW i8 oil capacity, type & filter

The 2018 BMW i8 takes 4.5 qt of 0W-20 oil.

Applies to checked engine: 1.5L 3-Cyl Turbo.

Capacity 4.5 qt i Based on 2 checked sources: 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 0W-20 i Based on 2 checked sources: Valvoline Product Finder and Castrol (Olyslager). Additional cross-check is still pending: additional evidence. Use it as a reference, then confirm the viscosity grade for this engine before checkout. See how we verify. Learn how we verify fitment OEM oil approval is not source-backed on this page; confirm the bottle or owner's manual before checkout.
Oil Filters Options cross-checked
Shown first PG99098EX Search PG99098EX Purolator L28209 Search L28209

PG99098EX is copied into the checkout checklist below. Other listed filters are source-backed alternatives.

4 sources checkedLast checked: 2026-06-25How we verify →

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

2018 BMW i8 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 2018 BMW i8

Capacity sources

Supported by Valvoline Product Finder and Castrol (Olyslager).

Oil type sources

Supported by Valvoline Product Finder and Castrol (Olyslager).

Filter sources

Supported by RockAuto and Purolator Part Finder.

Source coverage

4 checked source rows for the 2018 BMW i8.

Before ordering for this 2018 BMW i8

Checkout verification checklist
1.5L 3-Cyl Turbo
Capacity
4.5 qt
Oil type
0W-20
Filter
PG99098EX

Source check: Last checked 2026-06-25 from RockAuto, Purolator Part Finder, Valvoline Product Finder, and Castrol (Olyslager).

BMW i8 oil specs by year

This table includes checked BMW i8 model years available in our database.

Year Capacity Oil type Filter
2020 4.5 qt 0W-20 Purolator PL21756
2019 4.5 qt 0W-20 HASTINGS / BALDWIN P40182
2018 Current page 4.5 qt 0W-20 PG99098EX
2017 4.2 qt 0W-20 HASTINGS / BALDWIN P40182
2016 4.5 qt 0W-20 HASTINGS / BALDWIN P40182
2015 4.2 qt 0W-20 HASTINGS / BALDWIN P40182
2014 4.2 qt 0W-20 HASTINGS / BALDWIN P40182

How we verified 2018 BMW i8 oil data

How we verify fitment

Checked fitment data. Last checked: 2026-06-25.

This page checked 4 sources for the 2018 BMW i8. 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: 1.5L 3-Cyl Turbo capacity and 1.5L 3-Cyl Turbo oil type. 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
2026-06-25
Field-level source support
  • Capacity: Valvoline Product Finder and Castrol (Olyslager)
  • Oil type: Valvoline Product Finder and Castrol (Olyslager)
  • Filter: RockAuto and Purolator Part Finder
Source Supports Checked Link
RockAuto Filter 2026-06-25 Checked source
Purolator Part Finder Filter 2026-06-25 Visit brand site
Valvoline Product Finder Capacity, Oil type 2026-06-25 Checked source
Castrol (Olyslager) Capacity, Oil type 2026-06-25 Visit brand site

2018 BMW i8 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 BMW i8 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 BMW i8?

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.

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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