What oil is best for a 6.4 powerstroke?
The short answer: use a diesel engine oil that meets API CJ-4 or CK-4 with a 5W-40 viscosity, preferably a synthetic or synthetic-blend. This combination provides the protection and reliability a turbocharged, emissions-controlled 6.4 Power Stroke needs. Brand matters less than meeting the specification and viscosity, and synthetic oil typically offers the best protection and drain intervals.
Understanding the 6.4 Power Stroke's lubrication needs
The 6.4L Power Stroke is a turbocharged diesel designed to run hot and through exhaust aftertreatment. It requires oils with strong detergents, good shear stability, and low ash content to protect the engine and its emissions system. Oils that meet API CJ-4 or CK-4 specifications and carry a 5W-40 viscosity are the industry-standard choice for this engine.
API specs and viscosity explained
API CJ-4 and CK-4 oils are formulated for modern high-performance diesel engines with turbochargers and particulate filters. They provide enhanced detergents, better wear protection, and stable viscosity under heavy use. The 5W-40 viscosity is a common, versatile choice that performs well across a wide temperature range, from cold starts to hot highway runs.
What oil to use: approved standards and viscosity
To ensure compatibility and protection, select oils that explicitly state API CJ-4 or CK-4 certification and a 5W-40 viscosity. In extremely cold climates, some owners opt for 0W-40 or 5W-40; in very hot climates, 15W-40 can be used as an alternative, though synthetic 5W-40 is typically preferred for cold starts and turbo life.
Before listing recommended oils, note that the following options meet CJ-4/CK-4 and are commonly used in the 6.4 Power Stroke:
- Motorcraft 5W-40 Diesel Engine Oil (API CJ-4/CK-4) – Ford-approved diesel oil designed for Ford engines.
- Shell Rotella T6 5W-40 Full Synthetic Diesel Engine Oil (API CJ-4/CK-4) – widely used in diesel pickups and trucks.
- Mobil Delvac 1 ESP 5W-40 Full Synthetic Diesel Engine Oil (API CJ-4/CK-4) – premium synthetic option.
- Castrol EDGE Turbodiesel 5W-40 (API CJ-4/CK-4) – high-performance diesel oil.
- Total Quartz 5W-40 Full Synthetic Diesel Engine Oil (API CJ-4/CK-4) – versatile diesel oil option.
All of these are acceptable choices as long as they explicitly meet CJ-4 or CK-4 and carry a 5W-40 viscosity; always verify current labels and compatibility for your model year.
Maintenance intervals and practical tips
Oil-change intervals for a 6.4 Power Stroke depend on driving conditions, oil quality, and the vehicle’s manual. With CJ-4/CK-4 oils, typical normal-service intervals are around 7,500 miles (12,000 km) for many owners, but severe service—such as frequent towing, dusty conditions, or many short trips—may require changes every 5,000–7,500 miles (8,000–12,000 km). Always follow Ford’s owner’s manual or your mechanic’s recommendation, and regularly check oil level and condition between changes.
Practical maintenance tips
Use a high-quality diesel oil filter, replace it at each oil change, and avoid oils that do not meet CJ-4/CK-4 specifications. If towing heavy loads or operating in extreme heat, consult your technician about adjusting the interval or considering a slightly different viscosity within the CJ-4/CK-4 guidance.
Climate considerations and driving style
Climate and usage strongly influence oil choice and change frequency. Colder climates benefit from a 0W-40 or 5W-40 for easier cold starts, while extreme heat and consistent towing may justify more frequent changes. Always tailor maintenance to your driving conditions and follow the manual’s guidance.
Bottom line
For a 6.4 Power Stroke, the best oil is a 5W-40 diesel engine oil that meets API CJ-4 or CK-4 specifications, preferably synthetic or synthetic-blend. Brand matters less than meeting the specification and viscosity, and always follow Ford’s service recommendations and the oil label.
Summary
The Ford 6.4L Power Stroke relies on robust diesel oil that can handle turbocharged operation and emissions equipment. Choose a 5W-40 oil that explicitly meets API CJ-4 or CK-4, such as Motorcraft 5W-40, Rotella T6 5W-40, Mobil Delvac 1 ESP 5W-40, Castrol Edge 5W-40, or Total Quartz 5W-40, and adhere to recommended change intervals, adjusting for climate and towing. Proper lubrication helps protect the engine and turbo over the long term.
What oil does a 2010 F250 6.4 take?
2010–2008 F-250
6.4L Power Stroke Diesel (2008–2010): Ford's viscosity chart shows 0W‑40/0W‑30 acceptable in deep cold, 10W‑30 for moderate temps, and heavier 5W‑40 or 15W‑40 required for temps over 50°F (10°C) and for heavy towing.
What is the best oil for a 6.4 Powerstroke?
The best oil for a 6.4L Powerstroke depends on your climate, with 15W-40 recommended for warmer temperatures (above 0∘0 raised to the composed with power0∘F or -17.8∘negative 17.8 raised to the composed with power−17.8∘C) and 5W-40 for colder climates (below 0∘0 raised to the composed with power0∘F or -17.8∘negative 17.8 raised to the composed with power−17.8∘C). Top brands include Motorcraft, Shell Rotella, Delo, and Delvac. It's crucial to follow the oil weight and a suitable oil filter specification, as recommended by Ford.
Oil viscosity recommendations
- 15W-40: Use this for temperatures above 0∘0 raised to the composed with power0∘F (-17.8∘negative 17.8 raised to the composed with power−17.8∘C). Many users recommend this as a standard choice.
- 5W-40: This is the best choice for colder operating temperatures, down to -20∘negative 20 raised to the composed with power−20∘F (-28.9∘negative 28.9 raised to the composed with power−28.9∘C).
- 10W-30: This is an option for moderate temperatures, typically between 0∘0 raised to the composed with power0∘F and 20∘20 raised to the composed with power20∘F (-17.8∘negative 17.8 raised to the composed with power−17.8∘C and -6.7∘negative 6.7 raised to the composed with power−6.7∘C).
Recommended brands
- Motorcraft: Ford's own brand is consistently recommended by mechanics and users for its quality and compatibility with the engine.
- Shell Rotella: Another popular and widely used option.
- Mobil Delvac: Frequently mentioned alongside Delo as a solid choice.
- Delo: Considered a cost-effective and high-quality option.
Other tips
- Oil filter: Always use the correct oil filter specified for the engine. A high-quality filter is just as important as the oil itself.
- Ford specification: Ensure the oil you choose meets the Ford specification for the 6.4L Powerstroke, which is generally WSS-M2C171-F1.
- Engine longevity: Some users recommend periodically changing oil and filters to help keep the engine in good condition.
What kind of oil does a 2008 f350 6.4 Powerstroke take?
Engine Oil
5W-40 (Above -29°C) - 5W-40 or 15W-40 must be used for heavy duty driving and trailer towing. Capacity: 15 quarts (with filter). After refill check oil level.
What was the worst year for the 6.4 powerstroke?
Despite its complaints, the 6.4-liter Power Stroke features twin turbochargers and high-pressure common rail fuel injection, which results in 650 lb-ft of torque at peak. For the few years that the 6.4 was available, it's first production year in 2008 is considered the worst.
