What oil does a 2018 Ford F-550 6.7L Diesel take?
The 2018 Ford F-550 with the 6.7L 8-cylinder Engine Code [T] O Diesel Turbo requires an oil capacity of 13 quarts (including filter replacement). Recommended viscosities include 10W-30 for normal usage and 5W-40 for severe operations. For those using biodiesel fuel blends (up to B20), the manufacturer recommends using 5W-40 or 15W-40 oil.
AMSOIL product recommendations
Based on the AMSOIL lookup data, the following products are recommended for your Ford Power Stroke diesel engine maintenance.
Engine Oil Options
| Product Name | Viscosity | Product Code |
|---|---|---|
| AMSOIL Signature Series 100% Synthetic Max-Duty Diesel Oil | 10W-30 | DTTQT-EA |
| AMSOIL Signature Series 100% Synthetic Max-Duty Diesel Oil | 5W-40 | DEOQT-EA |
| AMSOIL 100% Synthetic Diesel Oil Heavy-Duty | 10W-30 | ADNQT-EA |
| AMSOIL 100% Synthetic Diesel Oil Heavy-Duty | 5W-40 | ADOQT-EA |
Oil Filter Options
Coolant & Antifreeze
| Product Name | Product Code |
|---|---|
| AMSOIL Passenger Car & Light Truck Antifreeze & Coolant | ANTPC1G-EA |
| AMSOIL Propylene Glycol Antifreeze and Engine Coolant | ANT1G-EA |
Engine Oil Specifications & Details
Proper lubrication is vital for the 6.7L Power Stroke engine to manage high-stress environments and continuous operation under load.
Oil Viscosity Guide
| Temperature Range | Recommended Viscosity/Notes |
|---|---|
| All Temperatures | 0W-30, 0W-40 (per AMSOIL lookup) |
| Above -18°C | 10W-30 (Normal usage); 5W-40 (Severe operations) |
| Above -7°C | 15W-40 recommended for certain conditions |
| Above -29°C | 5W-40 (Severe operations) |
Note: If biodiesel fuel blends (B20 max) are used, the use of 5W-40 or 15W-40 oil is recommended.
Oil Capacity & Torque Specs
| Specification | Value |
|---|---|
| Total Oil Capacity | 13 quarts (with filter) |
| Oil Drain Plug Torque | 19 ft/lbs |
Always check the oil level after refilling.
Diesel maintenance notes for this vehicle
- Filter Replacement: Always replace the oil filter when changing engine oil to ensure maximum capacity for contaminants.
- Biodiesel Usage: If your fleet or personal vehicle utilizes B20 biodiesel blends, adjust viscosity selection to 5W-40 or 15W-40 as recommended by the manufacturer.
- Drain Plug Maintenance: Ensure the oil drain plug is torqued to exactly 19 ft/lbs to prevent leaks or damage to the pan.
- Coolant Capacity: The system features a primary capacity of 35.1 quarts and a secondary capacity of 15.1 quarts.
Common diesel oil-related concerns and how AMSOIL products may help
| Concern | Why it matters | AMSOIL Product | How it may help | Limitation |
|---|---|---|---|---|
| Severe-service towing | Increases engine heat and stress | Signature Series Max-Duty Diesel Oil | Designed to support extreme-pressure protection | Requires proper service intervals |
| Contaminant buildup | Wear-causing particles damage components | AMSOIL Oil Filter (EAO98-EA) | Provides 99% efficiency at 20 microns | Does not replace regular changes |
| Extreme Temperatures | Affects viscosity and engine startup | Signature Series Diesel Oil | Excels in extreme temperatures | Not confirmed for all specific ambient extremes |
Common maintenance concerns for this vehicle
Based on owner reports, several areas require regular inspection:
- Turbocharger Health: One consumer report noted an intermittent service warning light potentially related to the turbocharger.
- Structural Integrity: There have been complaints regarding frame and subframe fractures in high-mileage vehicles; owners should inspect for cracks near the cab/bed area.
- Drivetrain Noise: Reports of humming sounds from the rear end may indicate ring and pinion wear.
Recall, TSB, and manufacturer communication notes
The following official NHTSA recall information was identified for the 2018 Ford F-550:
- Engine Block Heater (Campaign 18V894000): Certain models may experience corrosion in the block heater cable splice connector, which could lead to a resistive short and fire risk. Dealers can replace this cable free of charge.
- Brake Lights (Campaign 19V358000): Some F-550-based fire trucks may have brake lights that illuminate without the pedal being pressed, potentially confusing other drivers.
- Back-up Camera Monitors (Campaign 19V414000): Certain vehicles equipped with ASA Electronics Voyager monitors may revert to factory settings, causing reversed camera images.
Disclaimer: Always verify open recalls by checking your specific VIN through official Ford or NHTSA channels.
About this vehicle
The 2018 Ford F-550 is a heavy-duty vehicle within the Ford Super Duty series, specifically engineered for high-capacity work rather than being adapted from lighter consumer models like the F-150. It typically serves in a chassis-cab configuration, placing it in the Class 5 commercial category. This makes it a staple in construction, utility, and commercial transport industries due to its heavy payload and towing capabilities.
This model is powered by the Ford Power Stroke V8 diesel engine family. The Power Stroke series is recognized for its durability in industrial applications, providing the high torque necessary for continuous operation under load. Because these vehicles are often used in high-stress environments, maintenance protocols—particularly regarding fuel system integrity, turbocharger health, and robust cooling systems—are critical to ensuring long-term reliability.
Owners of these diesel workhorses should note that technical details can vary between different chassis-cab configurations. It is always recommended to cross-reference specific fluid requirements with the owner’s manual or a verified VIN lookup for exact specifications.
Common questions about this vehicle’s diesel oil and maintenance
How much oil does my 2018 F-550 6.7L take?
It takes 13 quarts of oil when performing a service that includes the filter replacement.
What is the recommended torque for the oil drain plug?
The oil drain plug should be torqued to 19 ft/lbs.
Can I use 10W-30 for normal driving?
Yes, the manufacturer recommends 10W-30 for normal usage. For severe operations, 5W-40 is recommended.
What should I use if I am running B20 biodiesel?
If using biodiesel fuel blends (up to B20), it is recommended to use 5W-40 or 15W-40 oil.
How efficient is the AMSOIL oil filter?
The AMSOIL Oil Filter provides a filtering efficiency of 99 percent at 20 microns, according to AMSOIL data.
How do I check for active recalls on my F-550?
You should contact a Ford dealer or use the NHTSA website to check your specific VIN for any open manufacturer communications or recalls.
Disclaimer: Information provided is based on available source data. Always consult your vehicle’s owner manual and professional mechanics for maintenance and repair.