Complete Oil Specifications
Your 2022 Ford Fiesta 1.0 EcoBoost 125 requires 5W-20 full synthetic oil meeting the Ford WSS-M2C948-B specification.
Quick Reference
| Specification | Value |
|---|---|
| Viscosity | 5W-20 |
| Ford Standard | Ford WSS-M2C948-B / ACEA A1/B1 |
| Capacity (with filter) | 4.0 quarts |
| Oil Filter | Ford 1S7J 6714 BA |
| Normal Interval | 15000 km |
Why WSS-M2C948-B 5W-20 Is Specified
The 1.0L EcoBoost 3-cylinder delivers remarkable power for its displacement by combining turbocharging, direct injection, and integrated exhaust manifold technology — the exhaust manifold is cast directly into the cylinder head, placing it in close thermal proximity to the turbocharger. Ford WSS-M2C948-B was developed specifically for EcoBoost engines to provide elevated oxidation resistance and turbo deposit control at these extreme temperatures. The 5W-20 viscosity optimises fuel economy while maintaining adequate film thickness across EcoBoost’s operating range.
Using incorrect oil will:
- ❌ Allow deposit formation on the integrated exhaust manifold and turbo bearing housing
- ❌ Reduce fuel economy by using a heavier viscosity than the specification requires
- ❌ Fail the Ford WSS-M2C948-B chemistry requirement even at the correct viscosity grade
Ford-Approved Oil Brands
-
✅ Castrol EDGE Professional A1/B1 5W-20 (Ford WSS-M2C948-B)
-
✅ Motorcraft Premium Synthetic 5W-20
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✅ Shell Helix Ultra Professional AF 5W-20
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✅ Total Quartz INEO First 5W-20
-
✅ Mobil 1 Advanced Fuel Economy 5W-20
Verify the label shows Ford WSS-M2C948-B. The older WSS-M2C913-D for naturally aspirated Ford engines is not an equivalent substitute for the EcoBoost turbo circuit.
Severe Service Check
You need the 10000-km interval if you:
- Drive predominantly short trips under 8 km
- Drive primarily in urban stop-and-go traffic
- Experience repeated cold starts in temperatures below −15°C
- Frequently drive with a full passenger and luggage load
Installation Details
Drain Plug Torque: 15 ft-lbs (20 Nm)
OEM Filter: Ford 1S7J 6714 BA
Aftermarket Filters:
-
Mann HU 7009 z
-
Mahle OX 716
-
WIX WL7096
Pro Tip: The Fiesta’s 1.0L EcoBoost produces a faint cold-start ticking from the fuel injectors — normal for direct injection. It disappears within 30 seconds as oil pressure stabilises. If it persists beyond 60 seconds, check the oil level.
FAQs
What oil does a 2022 Ford Fiesta 1.0 EcoBoost take?
5W-20 full synthetic oil meeting Ford WSS-M2C948-B.
How many quarts does it need?
4.0 quarts with a new filter, 3.7 without.
Can I use 5W-30 instead of 5W-20?
Ford specifies 5W-20 for optimal fuel economy and EcoBoost turbo protection. Using 5W-30 will not immediately damage the engine but does not satisfy Ford’s specification and slightly increases internal friction.
Is full synthetic mandatory?
Yes. Ford mandates full synthetic for the EcoBoost at the 15,000 km service interval. Semi-synthetic degrades before the full interval under turbocharged operating conditions.
How often should I change the oil?
Every 15,000 km or 12 months for normal driving. Every 10,000 km for predominantly short or severe-duty use.
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Last verified: 2026-05-21 | Source: 2022 Ford Fiesta Owner’s Manual