2015 Ford F-250 Super Duty Fluid Type Specs

Quick reference

Fluid	Type/Spec	Capacity
Engine Oil (6.2L)	SAE 5W-20, API SN or higher, WSS-M2C930-A	7.0 quarts (6.6 liters) with filter
Engine Oil (6.7L)	SAE 10W-30, API CJ-4/CK-4 for diesel, WSS-M2C171-F1	13.0 quarts (12.3 liters) with filter
Engine Coolant	Motorcraft Orange Antifreeze/Coolant, Ford WSS-M97B44-D	24.5 quarts (23.2 liters) for 6.2L; 29.5 quarts (27.9 liters) for 6.7L
Transmission Fluid	MERCON LV	Varies by transmission/application, typically 13-18 quarts
Transfer Case	MERCON LV	Approx. 2.0 quarts (1.9 liters)
Front Differential	SAE 75W-90 High Performance Rear Axle Lubricant, XY-75W90-QL (Dana Super 60)	Approx. 2.9-3.0 quarts (2.7-2.8 liters)
Rear Differential	SAE 75W-140 High Performance Rear Axle Lubricant, XY-75W140-QL (Sterling 10.5); for LS applications: XL-3 friction modifier required	Approx. 3.5-3.8 quarts (3.3-3.6 liters)
Brake Fluid	Motorcraft DOT 3 Brake Fluid, Ford Spec WSS-M6C65-A2	As required
Power Steering	MERCON LV	As required
Washer Fluid	Motorcraft Premium Windshield Washer Fluid, ZC-3-A	As required
DEF (6.7L Diesel)	API Certified Diesel Exhaust Fluid, ISO 22241	7.0 gallons (26.5 liters)

Engine Oil

The 2015 Ford F-250 Super Duty was available with two primary engine options: the 6.2L V8 gasoline engine and the 6.7L Power Stroke V8 turbo diesel engine. Each engine has specific oil requirements.

For the 6.2L V8 Gasoline Engine, Ford specifies SAE 5W-20 motor oil meeting API SN or a newer service classification. The Ford specification is WSS-M2C930-A. It is crucial to use oil that meets this specification to ensure proper engine lubrication and longevity. The capacity for the 6.2L engine is approximately 7.0 quarts (6.6 liters) with a filter change. Oil change intervals are typically every 7,500 to 10,000 miles or every six months, whichever comes first, under normal driving conditions. Always verify the exact interval in your owner's manual based on your specific driving habits.

For the 6.7L Power Stroke V8 Turbo Diesel Engine, Ford recommends SAE 10W-30 diesel engine oil. This oil must meet API CJ-4 or the newer API CK-4 service classification, as well as Ford specification WSS-M2C171-F1. The use of conventional automotive gasoline engine oils (e.g., API SN) in a diesel engine can lead to premature wear and damage. The 6.7L Power Stroke has a substantial oil capacity of about 13.0 quarts (12.3 liters) with a filter change. Diesel engines often have more stringent maintenance schedules; consult your owner's manual for the precise oil change interval, which can vary based on operational conditions and duty cycle.

Common Pitfalls: Always ensure you use the correct oil for your specific engine. Using gasoline engine oil in a diesel engine, or vice-versa, can cause significant damage. Sticking to the specified viscosity and Ford's WSS number is vital for optimal performance and meeting warranty requirements.

Engine Coolant

For both the 6.2L gasoline and 6.7L diesel engines in the 2015 F-250 Super Duty, Ford specifies Motorcraft Orange Antifreeze/Coolant. This is an Organic Acid Technology (OAT) coolant with a recommended service life of up to 10 years or 200,000 miles, whichever comes first. The Ford specification for this coolant is WSS-M97B44-D. This coolant is typically orange in color.

Coolant capacities are approximately 24.5 quarts (23.2 liters) for the 6.2L engine and significantly more for the 6.7L Power Stroke at around 29.5 quarts (27.9 liters). These capacities include the degas bottle (expansion tank).

Common Pitfalls: Never mix different types of coolants (e.g., OAT with HOAT or IAT). Mixing coolants can lead to chemical reactions, form gels or precipitates that clog the cooling system, and reduce the effectiveness of corrosion inhibitors. Always use distilled water if diluting concentrated coolant (though pre-mixed versions are readily available), and stick to the Ford-specified orange OAT coolant to prevent cooling system damage and maintain optimal thermal management.

Transmission Fluid

The 2015 Ford F-250 Super Duty utilizes MERCON LV automatic transmission fluid for its automatic transmissions (typically the 6R140 TorqShift). MERCON LV is a low-viscosity, fully synthetic fluid designed for specific Ford transmissions. It is crucial to use only MERCON LV where specified.

Capacities vary significantly depending on whether it's a drain and fill or a complete overhaul, and if the torque converter is drained. A basic pan drop and filter change will replace a fraction of the total capacity, which can be around 13-18 quarts (12.3-17.0 liters) for a full system capacity. Always refer to the service manual for precise refill procedures and capacities.

Common Pitfalls: Never use "universal" automatic transmission fluids or fluids labeled for older MERCON specifications (e.g., MERCON V) if MERCON LV is specified. The chemical composition and friction modifiers are different, and using the wrong fluid can cause shuddering, hard shifts, premature wear, and transmission failure.

Transfer Case Fluid

For 4WD and AWD models of the 2015 F-250, the transfer case also typically requires MERCON LV automatic transmission fluid. The approximate capacity is around 2.0 quarts (1.9 liters).

Common Pitfalls: Similar to the transmission, the wrong fluid in the transfer case can lead to improper clutch engagement (in electronically controlled transfer cases), premature wear, and system failure.

Differential Fluid

Ford Super Duty trucks are known for their robust axles, and the fluid specifications are equally robust.

For the Front Differential (often a Dana Super 60 in these trucks), Ford generally specifies SAE 75W-90 High Performance Rear Axle Lubricant meeting Ford spec XY-75W90-QL. The capacity is approximately 2.9-3.0 quarts (2.7-2.8 liters). Check your owner's manual for specific axle identification.

For the Rear Differential (commonly a Sterling 10.5-inch or 11.5-inch axle), Ford typically requires SAE 75W-140 High Performance Rear Axle Lubricant meeting Ford spec XY-75W140-QL. If your F-250 is equipped with a limited-slip differential (LSD), it is critical to add a friction modifier (Ford part number XL-3 or equivalent) to the gear oil to prevent chatter and ensure proper LSD operation. The capacity is approximately 3.5-3.8 quarts (3.3-3.6 liters).

Common Pitfalls: Incorrect fluid viscosity can lead to increased wear or overheating. For Limited-Slip Differentials, omitting the friction modifier will result in noticeable chatter or grinding noises during turns, and can damage the LSD clutches over time. Always verify axle type and differential fluid requirements in your owner's manual or OEM service information.

Brake Fluid

The 2015 Ford F-250 Super Duty uses Motorcraft DOT 3 Brake Fluid meeting Ford specification WSS-M6C65-A2. While DOT 4 can sometimes be used as an upgrade due to its higher wet boiling point, it