6.4 Powerstroke Engine Oil Capacity(+ Best Recommended Oils)

Proper oil maintenance not only extends the life of the engine but also helps it run smoothly, especially under heavy loads and high-temperature conditions. In this post, we’ll go in-depth on the 6.4 Powerstroke engine oil capacity, the recommended oil type, and some tips for maintaining your truck’s lubrication system.

6.4 Powerstroke Engine Oil Capacity

The 6.4 Powerstroke engine oil capacity is 15 quarts (14.2 liters) with a new oil filter. Ford recommends using 15W-40 or 10W-30 diesel engine oil that meets API CJ-4 specifications, with 15W-40 preferred for heavy-duty and warmer conditions, and 10W-30 suitable for colder climates.

To maintain optimal performance, oil should typically be changed every 5,000 miles, or sooner (around 3,000–4,000 miles) if the truck is used for towing, hauling, or other demanding conditions.

Owners should always replace the oil filter when changing oil, as failing to do so can reduce oil cleanliness and circulation efficiency. The 6.4 Powerstroke relies heavily on clean oil due to its emissions systems and high operating pressures.

Best Engine Oil For 6.4 Powerstroke

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1. Motorcraft Super Duty Diesel 15W-40 (API CJ-4)

Ford’s OEM-recommended oil for the 6.4 Powerstroke. Blends traditional and synthetic-base oils to deliver excellent protection under heavy towing and high-temperature operation. Its CJ-4 rating ensures it handles soot, high-pressure common-rail injection, and EGR byproducts effectively.

2. Shell Rotella T6 5W-40 Full Synthetic Diesel Oil

A full-synthetic oil that excels in both cold starts and high-heat stability. With low-temperature fluidity and robust thermal resistance, it’s a top choice for Powerstroke users across varying climates. Many experienced diesel owners favor it for its performance and engine cleanliness.

3. Mobil 1 Turbo Diesel 15W-40

A premium synthetic blend built to endure prolonged high-temp operation and heavy loads. Known for strong deposit control and excellent lubrication, this oil helps maintain durability in the demanding environments Powerstroke engines often face.

Ford recommends 15W-40 or 10W-30 diesel engine oil that meets API CJ-4 specifications. The choice between 15W-40 and 10W-30 often depends on the climate and driving conditions:

15W-40: Ideal for warmer climates, towing, and heavy-duty use. It provides better high-temperature stability.
10W-30: Works well in colder climates and for light-duty applications where easier cold starts are necessary.

Using the right oil viscosity ensures proper lubrication, prevents metal-to-metal contact, and protects against premature wear.

Why Oil Capacity Matters for the 6.4 Powerstroke

Because the 6.4 Powerstroke uses advanced systems such as high-pressure common-rail fuel injection and a dual turbocharger setup, it runs hotter and under more stress than many other engines. This makes oil quality and capacity especially important.

Here’s why keeping the correct oil level matters:

Lubrication: With 15 quarts of oil, the engine has ample lubrication across its moving parts, including pistons, crankshaft, and turbochargers.
Cooling: Oil acts as a cooling agent by absorbing and carrying away heat. Insufficient oil levels lead to overheating and damage.
Contaminant Removal: Diesel engines produce soot and carbon deposits. Oil helps suspend these particles, preventing sludge buildup.
Longevity: Proper oil maintenance extends engine life and avoids expensive repairs that are common in neglected 6.4 Powerstroke engines.

Oil Change Interval for the 6.4 Powerstroke

The typical recommended oil change interval for the 6.4 Powerstroke is every 5,000 miles under normal driving conditions. However, for trucks frequently used for towing, hauling, or stop-and-go driving, it’s advisable to change oil sooner, around 3,000–4,000 miles.

Some owners extend oil change intervals using synthetic oils, but with the 6.4’s sensitivity to oil quality, sticking to shorter intervals is a safer bet.

Steps to Change Oil on a 6.4 Powerstroke

Warm Up the Engine: Let the engine run briefly so the oil flows out more easily.
Drain the Old Oil: Remove the drain plug and allow the 15 quarts of oil to fully drain into a container.
Replace the Oil Filter: Install a new oil filter to ensure clean circulation.
Add New Oil: Pour in 15 quarts of the recommended diesel engine oil.
Check Oil Level: Use the dipstick to confirm the oil is within the recommended range.
Run the Engine & Recheck: Start the engine, let it idle, and check for leaks. Verify the oil level again after the engine has circulated the oil.

Common Oil-Related Problems on the 6.4 Powerstroke

The 6.4 Powerstroke has a reputation for being somewhat maintenance-heavy, and neglecting oil care only makes it worse. Some common issues related to poor oil management include:

Oil Dilution: Fuel can mix with engine oil, reducing its viscosity and protection. Frequent oil changes help minimize this issue.
Turbocharger Wear: Dirty or low oil can lead to premature turbocharger failure.
Injector Problems: The high-pressure fuel system requires clean oil for proper operation. Dirty oil increases wear on injectors.
DPF (Diesel Particulate Filter) Issues: Excess soot and oil contamination can accelerate clogging of the DPF system.

Best Practices for Oil Maintenance on the 6.4 Powerstroke

Always use high-quality diesel-specific oil that meets API CJ-4 standards.
Stick to shorter oil change intervals if you tow, haul, or drive in dusty conditions.
Monitor oil levels frequently, as this engine can consume oil.
Consider using synthetic diesel oil if you want extended protection under extreme conditions.
Keep up with fuel system and filter maintenance, as dirty fuel contributes to oil contamination.

FAQs

What is the best oil for a 6.4 Powerstroke?

The best oil for a 6.4 Powerstroke is 15W-40 diesel engine oil that meets API CJ-4 specifications, as it provides excellent protection under heavy loads and high operating temperatures. For colder climates, 10W-30 CJ-4 oil is also recommended to allow for easier cold starts.

How often should I change the oil in my 6.4 Powerstroke?

The oil in a 6.4 Powerstroke should typically be changed every 5,000 miles under normal conditions. However, if the truck is used for towing, hauling, or in stop-and-go driving, it is advisable to change the oil more frequently, around 3,000–4,000 miles, to prevent contamination and wear.

How much oil does a 2009 F250 6.4 take?

A 2009 Ford F-250 equipped with the 6.4 Powerstroke engine requires 15 quarts (14.2 liters) of engine oil with a filter change. Always replace the oil filter during an oil change for best performance and longevity.

What kind of oil does a 2010 6.4 Powerstroke take?

The 2010 6.4 Powerstroke engine takes 15W-40 or 10W-30 diesel engine oil that meets API CJ-4 standards. The choice depends on climate and usage, with 15W-40 being preferred for heavy-duty towing and warmer conditions, and 10W-30 recommended for colder weather.

Which oil should you recommend for Powerstroke engines?

For Powerstroke engines, Motorcraft Super Duty Diesel 15W-40 or other high-quality CJ-4 synthetic diesel oils are recommended. These oils are specifically formulated to handle the demands of modern diesel engines, providing protection against wear, soot buildup, and high-temperature stress.

What kind of oil does a 2008 Ford F250 6.4 diesel take?

The 2008 Ford F-250 with the 6.4 Powerstroke diesel engine requires 15W-40 or 10W-30 API CJ-4 diesel engine oil. The recommended capacity is 15 quarts (14.2 liters) with a filter change, ensuring proper lubrication and engine protection.

Final words

The 6.4 Powerstroke engine oil capacity is 15 quarts (14.2 liters) with filter, making it one of the larger-capacity engines in Ford’s diesel lineup. Maintaining proper oil levels and using the correct viscosity oil is critical to keeping your engine healthy, efficient, and long-lasting.

While the 6.4 Powerstroke may have a reputation for higher maintenance needs, diligent oil care can go a long way toward preventing costly issues and keeping your truck running strong.

Whether you use your Powerstroke for heavy-duty towing, hauling, or daily driving, prioritizing oil maintenance ensures your investment lasts for years.