2019 Kenworth T680 Oil Capacity & Filter Guide

Quick Answer

The 2019 Kenworth T680's oil capacity varies significantly by engine. For trucks equipped with the PACCAR MX-13 engine, expect an oil capacity of approximately 42.3 quarts (40 liters). For Cummins X15 engines, the capacity is typically around 44 quarts (41.6 liters).

• PACCAR MX-13 Oil Capacity: 42.3 quarts (40 liters)
  • Recommended Oil Weight: CK-4 10W-30 or 15W-40 (consult your owner's manual for specific viscosity recommendations based on climate).
  • Oil Specification: API CK-4 or FA-4 (FA-4 generally for improved fuel economy; ensure compatibility with your engine).
  • Oil Filter OEM Part Number: PACCAR 2102148PE or 2064375PE (always verify with a dealer using your VIN)
  • Aftermarket Cross-references:
    • Fram: CH11910
    • Wix: 57929
    • Mobil 1: M1C-452A
• Cummins X15 Oil Capacity: 44 quarts (41.6 liters)
  • Recommended Oil Weight: CK-4 10W-30 or 15W-40 (consult your owner's manual for specific viscosity recommendations based on climate).
  • Oil Specification: API CK-4 or FA-4 (FA-4 generally for improved fuel economy; ensure compatibility with your engine).
  • Oil Filter OEM Part Number: Cummins 4367100 or 5444211 (always verify with a dealer using your VIN)
  • Aftermarket Cross-references:
    • Fram: CH12683
    • Wix: 57745
    • Mobil 1: M1C-455A

Capacity by Engine Option

Oil Change Interval

The oil change interval for your 2019 Kenworth T680 can vary significantly based on engine type, operating conditions, and maintenance program. Always refer to your vehicle's owner's manual and engine manufacturer's guidelines for precise intervals.

• Normal Duty: For typical long-haul operations with good fuel quality and proper maintenance, intervals can range from 30,000 to 50,000 miles or 500-800 hours. Some advanced oil analysis programs can extend these intervals even further.
• Severe Duty: Vehicles operating in severe conditions (e.g., frequent idling, short hauls, dusty environments, excessive PTO use, or poor fuel quality) will require more frequent oil changes, potentially as low as 20,000 miles or 300-400 hours.

Regular oil analysis is highly recommended for heavy-duty trucks to optimize oil change intervals and detect potential engine issues early.

Drain Plug Torque

Proper drain plug torque is crucial to prevent leaks and damage to the oil pan. Always use a torque wrench.

• PACCAR MX-13 Drain Plug Torque: Typically 50-60 lb-ft (68-81 Nm). Always verify with the latest PACCAR service information or your owner's manual.
• Cummins X15 Drain Plug Torque: Typically 50-60 lb-ft (68-81 Nm). Always verify with the latest Cummins service information or your owner's manual.

Crush Washer Note: Many heavy-duty drain plugs use a crush washer or O-ring. Always replace these sealing components with new ones during every oil change to ensure a leak-free seal.

How to Change the Oil (General Steps)

Changing the oil on a heavy-duty truck like the Kenworth T680 requires proper equipment and safety precautions. If you are not experienced, it's best left to a professional.

1. Safety First: Park the truck on a level surface, engage the parking brake, chock the wheels, and wear appropriate personal protective equipment (PPE).
2. Warm Up Engine (Optional): Run the engine for a few minutes to bring the oil to operating temperature, which helps it drain more easily. Be cautious, as hot oil can cause burns.
3. Position Drain Pan: Place a large-capacity oil drain pan (you'll need one capable of holding 40+ quarts) under the oil pan drain plug.
4. Remove Drain Plug: Using the correct wrench, carefully remove the drain plug and allow the old oil to drain completely. Inspext the drain plug and replace the crush washer/O-ring.
5. Replace Drain Plug: Reinstall the drain plug and torque it to the manufacturer's specification.
6. Locate Oil Filters: Identify and locate all oil filters. Heavy-duty engines often have multiple filters.
7. Remove Old Filters: Use a suitable oil filter wrench to remove the old oil filters. Be prepared for some oil spillage.
8. Prepare New Filters: Apply a thin film of new engine oil to the gasket of each new filter. Fill the new filters partially with new oil (this helps prevent dry starts, but isn't always practical for large filters).
9. Install New Filters: Thread the new oil filters on by hand until the gasket just touches the mating surface. Then, turn an additional 3/4 to 1 full turn (or follow manufacturer instructions). Do not overtighten.
10. Add New Oil: Carefully pour the recommended amount and type of new engine oil into the oil fill port. Use a funnel to avoid spills.
11. Check Oil Level: Start the engine and let it run for a few minutes to circulate the new oil. Check for leaks around the drain plug and filters. Shut off the engine, wait a few minutes for the oil to settle, and then check the oil level using the dipstick. Add more oil if necessary.
12. Dispose of Old Oil: Properly dispose of the used oil and filters at an authorized recycling center.

Common Issues / Tips

• DEF System Integration: The 2019 T680, like most modern heavy-duty trucks, uses Diesel Exhaust Fluid (DEF). While not directly related to oil capacity, ensure your DEF system is properly maintained as issues can impact engine performance and regeneration cycles.
• DPF & Aftertreatment: Pay close attention to your Diesel Particulate Filter (DPF) and other aftertreatment system components. Proper engine oil (CK-4/FA-4) is critical to the longevity of these systems by reducing ash content.
• Oil Analysis: Invest in regular oil analysis. This is invaluable for heavy-duty applications as it provides insights into engine health, identifies contamination, and helps optimize oil change intervals, saving money and preventing costly repairs.
• Sensor Reliability: Modern truck engines have numerous sensors for oil pressure, temperature, and level. Keep an eye on your dashboard for any warning lights, and address sensor-related codes promptly.
• Turbocharger Care: Turbochargers rely heavily on clean, properly specified oil. Allowing the engine to cool down for a minute or two after heavy operation before shutting it off can help improve turbocharger bearing life.

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