2014 Ford F-350 Super Duty Fluid Type Specs

Quick reference

Fluid	Type/Spec	Capacity
Engine Oil	SAE 10W-30 (6.2L Gas M-2C945-A), SAE 15W-40 or 5W-40 (6.7L Diesel WSS-M2C171-F1)	6.2L Gas: 7.0 quarts, 6.7L Diesel: 13.0 quarts
Engine Coolant	Motorcraft Orange (VC-3-B / WSS-M97B44-D)	6.2L Gas: ~20 quarts, 6.7L Diesel: ~29 quarts
Transmission Fluid	TorqShift 6 automatic: MERCON LV	Varies, consult owner's manual for exact refill capacity after drain and fill
Transfer Case	MERCON LV	1.9-2.0 quarts
Front Differential	SAE 80W-90 (Dana M273 option), SAE 75W-140 (Ford 10.5 inch option)	Varies, consult owner's manual
Rear Differential	SAE 75W-140 P/N: XY-75W140-QL (Ford Sterling 10.5 inch), SAE 75W-90 High Performance (Dana M273 option)	Varies, consult owner's manual
Brake Fluid	DOT 3 (Motorcraft PM-1-A)	As needed
Power Steering Fluid	MERCON V	As needed
Washer Fluid	Motorcraft Premium Windshield Washer Concentrate (ZC-3-A) or equivalent	As needed, typically 1 gallon tank
Diesel Exhaust Fluid (DEF)	WSS-M99C111-A2 (ISO 22241-1 compliant)	7.0 gallons

Engine Oil

For the 2014 Ford F-350 Super Duty, the engine oil specifications vary significantly depending on whether you have the 6.2L gasoline engine or the 6.7L Power Stroke diesel engine.

6.2L Gasoline Engine: Ford specifies SAE 10W-30 engine oil meeting Ford WSS-M2C945-A for the 6.2L V8 gasoline engine. It is crucial to use oil that meets this Ford specification, or an equivalent API SN PLUS or later specification that is backward compatible. Always check your owner's manual for the most up-to-date information. The typical capacity for a drain and filter change is 7.0 quarts.

6.7L Power Stroke Diesel Engine: For the 6.7L Power Stroke diesel engine, Ford recommends using SAE 15W-40 engine oil meeting Ford WSS-M2C171-F1. In areas where temperatures are consistently below 20°F (-7°C), SAE 5W-40 meeting the same WSS-M2C171-F1 specification is recommended. This specification is designed for optimal performance and protection of the modern diesel engine, including its emissions systems. Many oils meeting API CJ-4 or, more recently, API CK-4 will also meet this Ford specification. The oil capacity for the 6.7L Power Stroke diesel engine is a substantial 13.0 quarts, including the filter. Adherence to service intervals is critical for diesel engines due to the higher soot and acid accumulation.

Intervals and Pitfalls:

• 6.2L Gas: Generally every 7,500 to 10,000 miles or 6-12 months, whichever comes first. Refer to your owner's manual for severe duty schedules.
• 6.7L Diesel: Typically every 7,500 to 10,000 miles or 6-12 months. Some advanced oil life monitoring systems can extend this. Always use oil meeting the specific Ford diesel spec to protect turbochargers and emissions equipment. Never use gasoline engine oil in a diesel engine.

Engine Coolant

The 2014 Ford F-350 Super Duty uses Motorcraft Orange Antifreeze/Coolant, which is an Organic Acid Technology (OAT) formulation. The Ford specification for this coolant is WSS-M97B44-D. The Motorcraft part number for the concentrate is VC-3-B.

Coolant Color and Technology: Motorcraft Orange should be diluted with distilled water to a 50/50 mix for optimal performance and freeze/boil protection. Never mix different types of coolants, especially OAT with HOAT (Hybrid Organic Acid Technology) or traditional green coolants, as this can lead to gel formation, corrosion, and damage to the cooling system. While it's orange, this is not Dex-Cool, which has its own GM specifications.

Capacity:

• 6.2L Gas: Approximately 20 quarts (5 gallons).
• 6.7L Diesel: Approximately 29 quarts (~7.25 gallons).

Intervals and Pitfalls: Ford generally recommends coolant replacement every 6 years or 100,000 miles, whichever comes first, for initial fill, and every 3 years or 50,000 for subsequent changes. Always drain the system thoroughly when replacing and refill with the correct specified coolant. Using tap water can introduce minerals that can lead to scaling and reduce cooling system efficiency.

Transmission Fluid

The 2014 Ford F-350 Super Duty, equipped with the TorqShift 6-speed automatic transmission, requires MERCON LV automatic transmission fluid. The "LV" stands for Low Viscosity, and it is crucial to use this specific fluid. Using any other type of MERCON fluid (such as MERCON V) or a universal ATF can cause shift quality issues, premature wear, and transmission damage.

Capacity: The capacity for a drain and refill can vary, but generally, it's around 7-8 quarts. A complete flush, which requires specialized equipment, would entail a much larger volume. Always consult your owner's manual for the precise refill capacity.

Intervals and Pitfalls: Ford recommends transmission fluid changes for severe duty use around 30,000 miles, and for normal use, intervals can extend up to 150,000 miles. However, many technicians and enthusiasts recommend more frequent changes for longevity, especially when towing or hauling heavy loads regularly. Never use "universal" or multi-vehicle ATFs unless explicitly stated they meet the MERCON LV specification from Ford itself. Always check fluid levels when the transmission is at operating temperature and the vehicle is on a level surface.

Transfer Case Fluid

For 4WD/AWD models of the 2014 Ford F-350 Super Duty, the transfer case also uses MERCON LV automatic transmission fluid. This is important to note as many transfer cases often use gear oil. Using MERCON LV ensures proper lubrication and operation of the transfer case components.

Capacity: The typical capacity for the transfer case is approximately 1.9 to 2.0 quarts.

Intervals and Pitfalls: Ford suggests checking and replacing transfer case fluid more frequently if the vehicle is used for off-road driving, towing, or plowing. A general recommendation is around 60,000 to 100,000 miles under normal conditions. Always ensure the correct MERCON LV fluid is used.

Differential Fluid

The 2014 Ford F-350 Super Duty can come with various differential options, and as such, the fluid specifications can differ.

Front Differential:

• Dana M273 Front Axle: Uses SAE 80W-90 gear oil. The Ford specification for this is WSP-M2C197-A.
• Ford 10.5 inch Front Axle (if equipped): Uses SAE 75W-140 full synthetic gear oil. The Ford specification for this is WSS-M2C944-A.

Rear Differential:

• Ford Sterling 10.5 inch (conventional or limited slip): Requires SAE 75W-140 full synthetic gear oil. For limited-slip differentials (LSD), a friction modifier (Ford P/N: XL-3) must be added if the fluid does not already contain it. Motorcraft part number XY-75W140-QL is the recommended fluid. The Ford specification is WSS-M2C944-A.
• Dana M273 Rear Axle (if equipped): Uses SAE 75W-90 High Performance gear oil. The Ford specification for this is WSS-M2C942-A. For limited-slip applications, ensure the fluid contains friction modifiers or add them separately.

Capacity: Differential capacities vary significantly based on the axle type and size. Always consult your owner's manual or OEM service information for exact capacities for your specific configuration.

Intervals and Pitfalls: Differential fluid should be checked and replaced more frequently if the truck is used for heavy-duty applications like towing, hauling, or off-roading. A common interval is around 30,000 to 50,000 miles for severe service, and up to 100,000 miles for normal use. Using the incorrect viscosity or failing to add friction modifier for LSDs can lead to chatter, wear, and damage.

Brake Fluid

For the 2014 Ford F-350 Super Duty, Ford specifies DOT 3 heavy-duty motor vehicle brake fluid. The Ford service part number is Motorcraft PM-1-A.

DOT 3 vs. DOT 4: While DOT 4 can often be mixed with DOT 3 (as they are both glycol-ether based), Ford specifically calls for DOT 3. Using DOT 5.1 is also generally compatible but not specified. Never use DOT 5 (silicone-based) fluid, as it is not compatible with systems designed for glycol-ether fluids and can cause seal damage and brake failure.

Intervals and Pitfalls: Draining and refilling brake fluid is often overlooked. Brake fluid is hygroscopic, meaning it absorbs moisture over time, which lowers its boiling point and can lead to internal corrosion of brake components. Ford recommends checking brake fluid condition periodically and replacing it every 2-3 years, especially in humid climates.

Power Steering Fluid

The 2014 Ford F-350 Super Duty uses MERCON V automatic transmission fluid for its power steering system. This is an important distinction, as some contemporary Ford vehicles might use a different, dedicated power steering fluid. Ensure you use MERCON V, not MERCON LV, as they have different viscosities and additive packages.

Intervals and Pitfalls: Power steering fluid does not have a strict replacement interval, but it is good practice to inspect its condition regularly. If the fluid appears dark, cloudy, or has a burnt smell, it should be flushed and replaced. A proactive approach to power steering fluid maintenance can prevent costly pump or rack and pinion failures.

Washer Fluid

Any commercially available windshield washer fluid is generally suitable for the 2014 Ford F-350 Super Duty. Ford offers their own Motorcraft Premium Windshield Washer Concentrate (ZC-3-A) or a pre-mixed equivalent. For optimal performance, especially in freezing conditions, always use a fluid designed for cold weather that contains de-icing agents.

Intervals and Pitfalls: Simply refill as needed. Some owners prefer to use a concentrated solution and mix with distilled water to prevent mineral deposits from tap water within the washer system.

Diesel Exhaust Fluid (DEF)

For the 6.7L Power Stroke diesel engine, Diesel Exhaust Fluid (DEF) is a crucial component of the Selective Catalytic Reduction (SCR) system. The 2014 Ford F-350 Super Duty requires DEF that meets ISO 22241-1 standards, which is also specified by Ford WSS-M99C111-A2. This ensures the DEF is pure and effective for reducing NOx emissions.

Capacity: The DEF tank capacity for the 2014 F-350 is approximately 7.0 gallons.

Intervals and Pitfalls: DEF consumption rates vary widely depending on driving conditions, load, and ambient temperature. Most trucks will require a DEF refill every few thousand miles. It is crucial to only use certified DEF. Never use contaminated, expired, or non-compliant DEF, as this can damage the SCR system and lead to costly repairs and potential derating of the engine's power. DEF has a shelf life, typically around 1-2 years, and should be stored in a cool, dry place out of direct sunlight. Never put DEF in the diesel fuel tank, or vice versa.

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