Complete Oil Specifications
Your 2024 Subaru Legacy 2.5L Boxer engine requires 0W-20 synthetic oil to maintain its efficiency and protect the unique flat-four configuration.
Quick Reference
| Specification | Value |
|---|---|
| Viscosity | 0W-20 |
| API Rating | API SP |
| Capacity (with filter) | 4.4 quarts |
| Oil Filter | 15208AA170 |
| Normal Interval | 6000 miles |
Why 0W-20 (API SP) is Critical for the Boxer Engine
The Boxer engine’s horizontal design means oil must travel through a complex gravity-defying lubrication circuit. 0W-20 provides the fast flow needed during startup, while the API SP rating ensures protection against timing chain wear and deposit formation.
Using incorrect oil will:
- ❌ Lead to increased internal friction (Boxer shimmy)
- ❌ Risk oil consumption at the piston rings
- ❌ Potentially slow down the VVT (Variable Valve Timing) response
Subaru-Approved Oil Brands
-
✅ Subaru Genuine Synthetic 0W-20
-
✅ Idemitsu Zepro 0W-20
-
✅ Mobil 1 Advanced Fuel Economy 0W-20
-
✅ Pennzoil Platinum 0W-20
-
✅ Castrol Edge 0W-20
Severe Service Check
Subaru recommends the 3000-mile interval if you:
- Drive in mountainous or hilly terrain
- Spend significant time in stop-and-go traffic
- Frequently drive in dusty or sandy conditions
- Drive in cold climates with many short trips
Installation Details
Drain Plug Torque: 31 ft-lbs
Note: Always replace the 16mm crush washer (803916010) on the drain plug at every oil change.
OEM Filter: 15208AA170
Aftermarket Filters:
-
Wix 57055
-
Mobil 1 M1-110A
-
Fram PH4386
Pro Tip: One of the best things about the Legacy is the “top-side” oil filter. It sits right in front of you when you open the hood—surrounded by a small drip cup. No tools except a hand are usually needed!
FAQs
What oil does a 2024 Subaru Legacy take?
Full synthetic 0W-20 oil meeting API SP standards.
How many quarts of oil does it need?
4.4 quarts.
Need these specs on your phone? Download OilFinderPro app for offline access and oil change reminders.
Last verified: 2026-03-10 | Source: 2024 Subaru Legacy Owner’s Manual