2015 Ford F-150 Fluid Specs & Capacities

Quick Reference

Fluid	Type/Spec	Capacity
Engine Oil	Varies by engine: 5W-20, 5W-30 (Full Synthetic recommended)	6.0 - 7.7 quarts
Engine Coolant	Motorcraft Orange (OAT), Ford Spec WSS-M97B44-D	12.0 - 15.7 quarts
Transmission Fluid	Motorcraft MERCON LV	13.1 quarts
Transfer Case Fluid	Motorcraft XL-12	1.5 quarts
Front Differential	80W-90, Motorcraft XY-80W90-QL	1.75 quarts
Rear Differential	75W-85, Motorcraft XY-75W85-QL	Varies (2.75 - 3.5 quarts)
Brake Fluid	DOT 4 LV High Performance, Ford Spec WSS-M6C65-A2	As needed
Power Steering	N/A (Electric Power Assisted Steering)	N/A
Windshield Washer	Any quality washer fluid	As needed

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This guide covers the essential fluid specifications for the 2015 Ford F-150. Using the correct fluids is critical for the longevity and performance of your truck. Always verify specifications in your owner's manual, as capacities and types can vary based on powertrain and equipment.

Engine Oil

Selecting the correct engine oil is the single most important maintenance item for your F-150. For 2015, Ford specified different oil viscosities depending on the engine. Using the wrong weight can lead to poor fuel economy, premature wear, and issues with the cam phaser timing system.

• 3.5L V6 Ti-VCT (Naturally Aspirated): SAE 5W-20 Synthetic Blend. Ford spec WSS-M2C945-A.
• 2.7L EcoBoost V6: SAE 5W-30 Synthetic Blend. Ford spec WSS-M2C946-A.
• 3.5L EcoBoost V6: SAE 5W-30 Synthetic Blend. Ford spec WSS-M2C946-A.
• 5.0L V8: SAE 5W-20 Synthetic Blend. Ford spec WSS-M2C945-A.

Capacity:

• 3.5L V6 Ti-VCT: 6.0 quarts (5.7 liters)
• 2.7L EcoBoost V6: 6.0 quarts (5.7 liters)
• 3.5L EcoBoost V6: 6.0 quarts (5.7 liters)
• 5.0L V8: 7.7 quarts (7.3 liters)

Notes: While Ford shipped the trucks with a synthetic blend, we strongly recommend using a full synthetic oil that meets the appropriate Ford WSS specification. Full synthetics offer superior protection against heat, turbocharger wear (on EcoBoost models), and oil breakdown. The "GF-5" or newer API starburst symbol should also be on the bottle. Change interval is typically 7,500-10,000 miles, but follow the truck's Intelligent Oil-Life Monitor® for the most accurate schedule.

Engine Coolant

The 2015 F-150 uses a specific Organic Acid Technology (OAT) coolant.

• Type: Motorcraft Orange Antifreeze/Coolant (OAT)
• Specification: Ford WSS-M97B44-D

Capacity: 12.0 - 15.7 quarts (11.4 - 14.9 liters) depending on engine and radiator configuration.

Notes: Do not mix coolant types. Never add green, yellow, or purple coolants to the system. If the incorrect coolant is added, it can gel and cause catastrophic blockages in the radiator, heater core, and engine passages. Use only Motorcraft Orange or an aftermarket equivalent that explicitly meets the Ford WSS-M97B44-D specification. The system should be filled with a 50/50 mix of distilled water and coolant for protection down to -34°F (-36°C).

Transmission Fluid

All 2015 F-150s are equipped with the 6R80 6-speed automatic transmission.

• Type: Motorcraft MERCON® LV Automatic Transmission Fluid
• Specification: MERCON LV

Capacity: Approximately 13.1 quarts (12.4 liters) for a full system flush.

Notes: This is a critical specification. Do not use multi-vehicle or universal transmission fluids. Do not use older MERCON V or any other type of ATF. Using the wrong fluid will lead to poor shifting, torque converter shudder, and eventual transmission failure. A drain-and-fill procedure will only replace about 5-6 quarts of fluid. A full fluid exchange using a machine is recommended at the proper service interval (around 100,000-150,000 miles, check your manual) to replace all of the old, degraded fluid.

Drivetrain Fluids

Transfer Case (4WD Models)

• Type: Motorcraft Transfer Case Fluid
• Specification: XL-12
• Capacity: ~1.5 quarts (1.4 liters)

Front Differential

• Type: Motorcraft SAE 80W-90 Premium Rear Axle Lubricant
• Specification: XY-80W90-QL
• Capacity: ~1.75 quarts (1.6 liters)

Rear Differential

The rear differential fluid spec depends on the axle installed in your truck.

• Type (most common): Motorcraft SAE 75W-85 Synthetic Rear Axle Lubricant
• Specification: XY-75W85-QL

Notes: Some heavy-duty or max-tow packages may have come with a different axle requiring 75W-140 synthetic fluid. If your truck has a limited-slip differential (LSD), you must also add 4 oz. of Motorcraft Additive Friction Modifier (XL-3). Failure to add this modifier will cause the clutch packs in the differential to chatter and grab during turns. Always check the axle tag or your owner's manual to be certain of the correct fluid and whether a friction modifier is required.

Brake Fluid

• Type: Motorcraft DOT 4 Low Viscosity (LV) High Performance Motor Vehicle Brake Fluid
• Specification: WSS-M6C65-A2

Capacity: Fill as needed. A full system flush typically uses 32-48 oz.

Notes: DOT 4 LV is specified for its performance in modern ABS and traction control systems. While standard DOT 3 or DOT 4 fluid will work in an emergency, it is highly recommended to use the specified low-viscosity fluid for optimal braking performance and safety system response. Brake fluid is hygroscopic (absorbs moisture), and should be flushed every 2-3 years to prevent corrosion and a spongy pedal feel.

Power Steering

The 2015 Ford F-150 is equipped with Electric Power Assisted Steering (EPAS). There is no hydraulic power steering pump, reservoir, or fluid to check or change.

Windshield Washer Fluid

• Type: Any good-quality windshield washer solvent.

Notes: Use a de-icing formula in colder climates to prevent freezing in the reservoir and on the windshield.

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