1. Oil Change Intervals

It’s recommended to change the oil every 7,500 miles for normal driving and every 5,000 miles for heavy towing or extreme conditions. Using high-quality oil like Motorcraft SAE 10W-30 or 15W-40 ensures the engine’s longevity and performance.

• Oil Capacity: 13 quarts with filter.
• Recommended Oil: Motorcraft SAE 10W-30 or 15W-40 for hotter climates.

2. Upgraded Fuel Filter System

The 2015-2019 6.7 Powerstroke uses an improved dual-filter system. Replace both the primary and secondary filters every 15,000 miles to avoid clogging and injector damage. The Motorcraft FD-4625 fuel filter is recommended for these models.

• Primary Fuel Filter Location: Mounted along the frame rail.
• Secondary Fuel Filter Location: Under the hood, near the engine bay.
• Fuel Filter Part: Motorcraft FD-4625.

3. Advanced Cooling System

Overheating is a common risk for diesel engines, especially under heavy load. To prevent this, inspect the coolant system regularly and replace the coolant every 105,000 miles. Use Motorcraft Orange Coolant VC-3DIL-B to maintain optimal temperature regulation.

• Coolant Capacity: 27.5 quarts.
• Recommended Coolant: Motorcraft Orange Coolant (Prediluted) VC-3DIL-B.
• Recommended Upgrade: Sinister Diesel Coolant Filtration System (double check year range on all systems)

4. Air Filter Maintenance

The air filter should be checked every 15,000 to 30,000 miles to ensure the engine receives proper airflow. If you drive in dusty conditions, inspect it more frequently. The Motorcraft FA-1902 air filter is ideal for second-generation models.

• Recommended Air Filter: Motorcraft FA-1902.
• Performance Upgrade: Sinister Diesel Cold Air Intake Kit for improved airflow. (double check the year range on all intakes)

5. DEF System Care

The DEF system in the 2015-2019 6.7 Powerstroke is more efficient but requires regular refills. Keep the tank topped up with **ISO 22241-certified DEF fluid** to avoid the truck going into limp mode.

• DEF Tank Capacity: 5 gallons.
• Recommended DEF Fluid: Motorcraft DEF or any ISO 22241-compliant DEF fluid.

6. Transmission Fluid and Filter

Heavy-duty driving requires regular transmission fluid changes to prevent wear. Replace the transmission fluid and filter every 30,000 miles using Motorcraft Mercon LV fluid for smooth shifting.

• Transmission Fluid Capacity: 18 quarts.
• Recommended Fluid: Motorcraft Mercon LV.
• Transmission Filter: Motorcraft FT-180.

7. Battery and Electrical System

Diesel engines need robust battery power, especially in cold conditions. Check your truck's **Group 65** batteries annually and replace them as needed to ensure reliable starts and electrical system performance.