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2018 Subaru Impreza Oil Capacity and Required 0W-20

2018 Subaru Impreza Oil Capacity and Required 0W-20 with application table, generation boundaries, verification steps.

Sources researched August 14, 2026·1 source reference·Print-friendly
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Subaru specifies 4.7 US qt (4.4 L) during an oil-and-filter change on the 2018 Impreza 2.0L.

Application note: This specification applies to the naturally aspirated U.S.-market 2018 Impreza. It is not a WRX or WRX STI value, and it should not be assumed for a different FB/EJ engine generation merely because the badge still says Impreza.

Subaru specifies 4.7 US qt (4.4 L) during an oil-and-filter change on the 2018 Impreza 2.0L.

This specification applies to the naturally aspirated U.S.-market 2018 Impreza. It is not a WRX or WRX STI value, and it should not be assumed for a different FB/EJ engine generation merely because the badge still says Impreza.

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Interactive 2018 Impreza 2.0L specification guide

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REFERENCE TABLE

Subaru Impreza Oil Capacity Specs

APPLICATION / ITEMSPECIFICATIONNOTES
Oil and filter change4.7 US qt4.4 L; 3.9 Imperial qt
Engine2.0L naturally aspirated2018 Impreza
Specified viscositySAE 0W-20 syntheticDo not substitute WRX 5W-30 row
Oil qualityAPI SN RC or ILSAC GF-5Final level by dipstick

Use synthetic SAE 0W-20 meeting ILSAC GF-5 or API SN with Resource Conserving wording as stated in the guide. Refill short of 4.7 qt, circulate the oil and check for filter or drain-plug leaks, then allow drain-back on level ground and finish at the dipstick full mark. Subaru's guide shows roughly one quart between the low and full marks, but that is a correction reference—not permission to add a full quart without checking.

Application boundaries for 2018 Impreza 2.0L

This specification applies to the naturally aspirated U.S.-market 2018 Impreza. It is not a WRX or WRX STI value, and it should not be assumed for a different FB/EJ engine generation merely because the badge still says Impreza.

Use synthetic SAE 0W-20 meeting ILSAC GF-5 or API SN with Resource Conserving wording as stated in the guide. Refill short of 4.7 qt, circulate the oil and check for filter or drain-plug leaks, then allow drain-back on level ground and finish at the dipstick full mark. Subaru's guide shows roughly one quart between the low and full marks, but that is a correction reference—not permission to add a full quart without checking.

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Build-specific specifications take priority

Subaru 2018 Impreza 2.0L specifications can change by model year, engine, platform, wheel, and installed component. Confirm the VIN or engine identity, part numbers, fastener condition, and the current manufacturer instructions before service.

SHARED PROCEDURES

Procedures used with this specification

These steps are the same for every vehicle in this family, so they are documented once rather than repeated on each page. The values above remain specific to this Subaru 2018 Impreza 2.0L.

COMMON QUESTIONS

2018 Subaru Impreza Oil Capacity and Required 0W-20 FAQs

How much oil does a 2018 Subaru Impreza take?+

4.7 US qt (4.4 L) during an oil-and-filter change on the 2018 Impreza 2.0L.

Does this figure cover a WRX or STI?+

No. It applies to the naturally aspirated U.S.-market 2018 Impreza. It is not a WRX or WRX STI value and should not be assumed for a different FB or EJ engine generation just because the badge still reads Impreza.

Which oil does the 2018 Impreza 2.0L require?+

Synthetic SAE 0W-20 meeting ILSAC GF-5, or API SN with Resource Conserving wording, as stated in the guide.

My dipstick reads low — can I add a full quart?+

No. Subaru's guide shows roughly one quart between the low and full marks, which is a correction reference rather than permission to add a quart without checking. Top up gradually and re-read the dipstick on level ground.

SOURCE TRAIL

Technical sources

TorqueSheet favors engine- and component-specific manufacturer instructions over unsourced universal values.

12018 Subaru Impreza Quick Guide — engine oilPrimary Subaru guide specifying 4.7 US qt (4.4 L) for an oil-and-filter change and synthetic 0W-20 meeting API SN Resource Conserving or ILSAC GF-5.
SOURCES RESEARCHED · 2026-08-14

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