Complete Oil Specifications
Your 2023 Ford F-250 Super Duty equipped with the 6.7L Power Stroke diesel requires 15W-40 oil meeting API CK-4 and Ford spec WSS-M2C171-F1 standards.
Quick Reference
| Specification | Value |
|---|---|
| Viscosity | 15W-40 |
| API Rating | API CK-4 |
| Ford Spec | WSS-M2C171-F1 |
| Capacity (with filter) | 13.1 quarts |
| Oil Filter | Motorcraft FL-2016 |
| Normal Interval | 10000 miles |
Why 15W-40 is Critical for This Engine
The 6.7L Power Stroke is a high-compression turbodiesel V8 built for maximum towing and payload capacity. It produces up to 500 hp and 1,200 lb-ft of torque — torque levels that place enormous shear stress on the oil film at main and rod bearings. 15W-40 provides the high-temperature film strength (HTHS viscosity) that prevents bearing contact under these extreme loads.
Diesel engines also contend with soot loading — combustion byproducts that accumulate in the oil over time and increase viscosity. API CK-4 certification requires oils to maintain stable viscosity in the presence of soot and provide enhanced oxidation resistance at the elevated temperatures of a hard-working diesel.
The Ford WSS-M2C171-F1 specification adds additional requirements for shear stability and seal compatibility specific to the Power Stroke’s high-pressure fuel injection system.
For temperatures consistently below -20°F, Ford approves 10W-30 as a cold-weather alternative.
Using 5W-30 or API SP gasoline engine oil will:
- ❌ Fail to provide the HTHS viscosity required at 1,200 lb-ft torque bearing loads
- ❌ Not meet API CK-4 soot dispersancy requirements, leading to viscosity increase between changes
- ❌ Potentially damage the high-pressure fuel injection system
Ford-Approved Oil Brands
-
✅ Motorcraft SAE 15W-40 Super Duty Diesel Motor Oil
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✅ Shell Rotella T4 Triple Protection 15W-40
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✅ Delo 400 LE SAE 15W-40
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✅ Mobil Delvac 1300 Super 15W-40
Verify both API CK-4 and the Ford WSS-M2C171-F1 spec on the container or product data sheet. Many premium diesel engine oils carry both designations.
Severe Service Check
You need the 5000-mile interval if you:
- Tow at or near the F-250’s rated maximum gross combination weight regularly
- Operate in extreme heat above 100°F with sustained high load
- Idle for extended periods (diesel-specific wear mode due to low-temperature operation)
- Work the truck as a commercial vehicle with near-daily towing cycles
Installation Details
Drain Plug Torque: 21 ft-lbs The 6.7L Power Stroke uses a standard steel oil pan. Replace the drain plug gasket at every service — Motorcraft part PM-11.
OEM Filter: Motorcraft FL-2016
Aftermarket Filters:
-
WIX 57060XP
-
Donaldson P550762
-
Fleetguard LF16035
Pro Tip: The 6.7L Power Stroke holds 13.1 quarts — use a drain pan rated for at least 4 gallons. The oil filter is a cartridge unit in a canister on the driver’s side of the engine. Access from the top using a 32mm cap wrench. Ford’s DEXLIFE Intelligent Oil Life Monitor calculates change intervals based on actual fuel consumption, load, and temperature — do not reset it manually; let it track true service life.
FAQs
What oil does a 2023 Ford F-250 6.7L Power Stroke take? 15W-40 diesel engine oil meeting API CK-4 and Ford spec WSS-M2C171-F1.
How many quarts does it need? 13.1 quarts with a new filter, 12.6 without.
Is this spec different from the 2023 F-250 6.2L gas model? Completely different. The 6.2L gas V8 uses 5W-30 API SP. The 6.7L Power Stroke diesel uses 15W-40 API CK-4. Never use diesel engine oil in the gas engine or vice versa.
Can I use 5W-40 full synthetic diesel oil? Ford’s primary specification for normal ambient temperatures is 15W-40. While some API CK-4 5W-40 synthetic oils are used in Power Stroke applications, Ford’s owner’s manual and Motorcraft recommendations default to 15W-40 for most operating conditions. Consult Ford’s current oil selector tool for specific 5W-40 approvals.
How often should I change the oil? Every 10000 miles for normal on-highway use. The DEXLIFE monitor may extend or shorten this based on actual duty cycle. Never exceed 10,000 miles or 12 months regardless of indicator status.
Does the diesel engine use the same oil filter as the gas F-250? No. The 6.7L Power Stroke uses a Motorcraft FL-2016 cartridge. The 6.2L gas engine uses a different filter. Always verify the filter part number matches your engine.
Need these specs on your phone? Download OilFinderPro app for offline access and oil change reminders.
Last verified: 2026-04-14 | Source: 2023 Ford F-250 Super Duty Owner’s Manual