Powerstroke 6.4L Fluid Capacities
Fluid TypeApplicationOil CapacityService IntervalFluid SpecNotes
Engine OilF250 Super Duty,F350 Super Duty,6.4L Eng w/Filter15.00 QTS.10,000 miles/6 months under normal operating conditions -- 5,000 miles/6 months under severe duty conditionsSAE 10W-30 Super Duty Diesel Motor Oil or equivalent, SAE 15W-40 Super Duty Diesel Motor Oil
Fuel TankF250 Super Duty,F350 Super Duty,6.75 FT. Bed Len29.00 GALS.Ultra-Low Sulfur Diesel
Fuel TankF250 Super Duty, F350 Super Duty,8 FT. Bed Len38.00 GALS.Ultra-Low Sulfur Diesel
Automatic Transmission FluidTrans Mfr CD 5R110W TorqShift7.4 QTS.30,000 milesMOTORCRAFT Automatic Transmission Fluid MERCON SP
MERCON, MERCON V and MERCON SP are not interchangeable. DO NOT mix MERCON, MERCON V and MERCON SP. Approximate dry capacity including transmission fluid cooling system, actual refill capacities will vary based on vehicle application and transmission fluid cooling system. The amount of transmission fluid and fluid level should be set by the indication on the dipstick’s normal operating range.
Brake FluidMOTORCRAFT High Performance DOT 3 Motor Vehicle Brake Fluid
Fill to line on reservoir.
Differential Gear OilF250 Super Duty,F350 Super Duty5.80 PTS.150,000 miles under normal operating conditions (50,000 miles for F-450, F-550) 50,000 miles under severe duty conditionsSAE 80W-90 Premium Rear Axle Gear Oil
Differential Gear OilF250 Super Duty,F350 Super Duty6.90 PTS.150,000 miles under normal operating conditions (50,000 miles for F-450, F-550) 50,000 miles under severe duty conditionsSAE 75W-140 Synthetic Rear Axle Gear Oil
FORD design rear axles contain a synthetic lubricant that does not required changing unless the axle has been submerged in water. Add 8 oz. of Additive Friction Modifier XL-3 or equivalent meeting FORD Specification: (EST-M2C118-A) for a complete refill of Limited Slip Axles.
Differential Gear OilF250 Super Duty,F350 Super Duty8.50 PTS.150,000 miles under normal operating conditions (50,000 miles for F-450, F-550) 50,000 miles under severe duty conditionsSAE 75W-90 Synthetic Rear Axle Gear Oil
Differential Gear OilF250 Super Duty, F350 Super Duty14.00 PTS.SAE 75W-140 Synthetic Rear Axle Gear Oil
Engine CoolantF250 Super Duty,F350 Super Duty,6.4L Eng30.60 QTS.FORD Premium Gold Engine Coolant w/bittering agent
Add the coolant type originally equipped in the vehicle.
Power Steering FluidMOTORCRAFT Automatic Transmission Fluid MERCON V
Fill between “max” and “min” lines on the reservoir.
Transfer Case Fluid4WD2.00 QTS.150,000 miles under normal operating conditions 60,000 miles under severe duty conditionsMOTORCRAFT Transfer Case Fluid
Service refill capacity is determined by filling the Transfer Case to the bottom of the filler hole with the vehicle on a level surface.
Windshield Washer Fluid4.25 QTS.MOTORCRAFT Premium Windshield Washer Concentrate Fluid
Follow the Manufacturer’s Instructions for the mixture ratio.
Air Cond RefrigerantF250 Super Duty,F350 Super Duty1.70 LBS.R-134a
Best Oil for a 6.4 Powerstroke
What Is the Best Oil for a 6.4 Powerstroke?
A powerful diesel engine like the 6.4 Powerstroke requires a heavy-duty oil solution, especially when working in intense weather or elevated terrain. A high-quality synthetic oil will help protect your engine when it’s under stress.
An effective oil will maintain viscosity when it becomes heated and fluidity when chilled. Balancing density and viscosity, 5W-40 is often an ideal solution for a 6.4 Powerstroke in areas where the temperature can dip to minus 20 F. Trucks in climates with milder winters may be better off with up to 15W-40.
The major benefits of synthetic oil, as opposed to traditional solutions, are that they offer consistent viscosity, excellent stability and a low decomposition rate. Synthetic oil also remains viable longer than other blends, potentially lasting as long as 10,000 miles under normal operation.
Hot Shot’s Secret offers Blue Diamond PAO, an oil designed specifically for diesel engines like the Powerstroke 6.4. The Blue Diamond line uses true PAO oils for maximum longevity and performance additives to give your engine superior mileage and horsepower. This formula includes patented R3 Nano-Technology and a CK-4 additive package from Hot Shot’s Secret to take oil durability to the next level.
Oil Change Interval & Capacity
Powerstroke 6.4L Fluid Capacities
One of the most important steps to preventing damage and maintaining performance in your 6.4L Powerstroke engine is adding the right amount of the right fluids. The team of experts here at Hot Shot’s Secret has put together this guide to walk you through how to pick the best oil for your 6.4 and determine how much you need in your truck.
How Much Fluid Do You Need in Your 6.4L Powerstroke?
Having adequate — but not excessive — fluid is vital to keeping your 6.4L Powerstroke in top condition. It’s always most important to keep a close eye on your dipstick or other full/max lines. The goal is to achieve a balance. You don’t want to give your truck more fluid than it needs, but you want to ensure it has more than the minimum required for function in order to protect your engine.
DIY Service Video Series
Choose Hot Shot’s Secret Oils for Your 6.4L Powerstroke
The diesel experts at Hot Shot’s Secret know that you chose the Powerstroke 6.4L as your engine because you want heavy-duty capability. That’s why our team develops cutting-edge diesel formulas to take performance to the next level. Trust us for solutions including oil additives, fuel additives, engine oils, bypass filters, transmission fluids and additives, and more.
Want to make a purchase or ask one of our experts a question? Shop our diesel additive options online or give our team a call at 800-341-6516.