Complete Oil Specifications
Your 2023 Alfa Romeo Tonale 1.5T MHEV requires 0W-20 full synthetic oil meeting the FCA 9.55535-GSX specification and ACEA C5 standard.
Quick Reference
| Specification | Value |
|---|---|
| Viscosity | 0W-20 |
| Standard | FCA 9.55535-GSX / ACEA C5/C6 |
| Capacity (with filter) | 4.5 quarts |
| Oil Filter | Stellantis 46347812 |
| Normal Interval | 18000 miles or 12 months |
Why FCA 9.55535-GSX Matters for the Tonale MHEV
The Tonale 1.5T uses Stellantis’s GSE T4 direct-injection turbocharged engine paired with a 48V mild hybrid Belt Integrated Starter Generator (BISG). The combination of direct injection and a GPF demands the GSX specification specifically:
- GSX vs older FCA specs: Earlier FCA specs (9.55535-S1, S2, S3) used ACEA C2 chemistry (5W-30 or 0W-30). The Tonale’s GPF requires the newer GSX spec (ACEA C5/C6), which has lower sulphated ash content than S-series oils. Using an older S-series oil will gradually clog the GPF.
- 0W-20 for the BISG system: The 48V mild hybrid system operates the BISG during cold starts and engine-off coast events. 0W-20’s superior cold-flow properties support fast oil pressure build-up when the combustion engine restarts from an engine-off coast, reducing wear on direct-injection components at restart.
- Turbocharger protection: The GSX additive package includes enhanced oxidation inhibitors to handle the thermal stress from the turbocharger at the higher specific output of this engine.
Alfa Romeo-Approved Oil Brands
-
✅ Selenia K Pure Energy 0W-20 Multi Air (FCA GSX certified)
-
✅ Castrol Edge Professional 0W-20
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✅ Shell Helix Ultra ECT C5 0W-20
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✅ Total Quartz INEO EFS 0W-20
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✅ Petronas Syntium 7000 FJ 0W-20
Confirm FCA 9.55535-GSX on the data sheet. Selenia K Pure Energy is the Stellantis house brand oil and is among the easiest to source with confirmed GSX certification.
Severe Service Check
You need the 9000-mile interval if you:
- Drive predominantly short trips under 5 miles (prevents GPF passive regeneration)
- Operate primarily in dense city traffic
- Use the vehicle for frequent towing or trailer work
- Drive in sustained extreme temperatures
Installation Details
Drain Plug Torque: 22 ft-lbs (30 Nm) — M14×1.5 thread
OEM Filter: Stellantis 46347812
Aftermarket Filters:
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Mann-Filter HU 68 x
-
Mahle OC 473
-
WIX 51394
FAQs
What oil does a 2023 Alfa Romeo Tonale 1.5T take? 0W-20 full synthetic oil meeting FCA 9.55535-GSX and ACEA C5.
Can I use older FCA 9.55535-S3 oil? No. The S3 specification uses ACEA C2 chemistry which is incompatible with the Tonale’s Gasoline Particulate Filter. Use only the GSX specification.
Does the mild hybrid system affect oil change intervals? The 48V BISG does not significantly alter oil change frequency, but the frequent engine stop/restart cycles under mild hybrid operation make high-quality 0W-20 oil even more important for rapid oil pressure build-up.
How many quarts does it need? 4.5 quarts with a new filter, 4.2 without.
Need these specs on your phone? Download OilFinderPro app for offline access and oil change reminders.
Last verified: 2026-05-27 | Source: 2023 Alfa Romeo Tonale Owner’s Manual