2017 Kenworth T680 Oil Capacity & Filter

The 2017 Kenworth T680 takes between 38 and 48 quarts of engine oil, depending on the specific engine installed.

Quick answer

Here's a quick overview of the oil capacity, recommended oil, and filter information for the 2017 Kenworth T680:

• Oil Capacity: 38 - 48 quarts (36 - 45.4 Liters)
• Recommended Oil Weight: 10W-30 or 15W-40 (CK-4 or FA-4 diesel specifications)
• Oil Specification: API CK-4 or FA-4 (consult your owner's manual for the specific engine recommendations)
• Oil Filter (PACCAR MX-13):
  • OEM: PACCAR 1935661PE
  • Wix: 57700
  • Fleetguard: LF17503
• Oil Filter (Cummins ISX15):
  • OEM: Cummins 4367100
  • Wix: 57700 (Shared with PACCAR MX-13)
  • Fleetguard: LF14000NN

Capacity by engine option

The 2017 Kenworth T680 was primarily equipped with two main engine options, each having a different oil capacity:

Always verify your specific engine and capacity in your owner's manual.

Oil change interval

The oil change interval for your 2017 Kenworth T680 can vary significantly based on operating conditions and oil analysis results.

• Normal Duty: Typically every 30,000 to 50,000 miles or 500 hours, whichever comes first. This can be extended with oil analysis programs.
• Severe Duty: Every 20,000 to 30,000 miles or 250-350 hours, whichever comes first. Severe duty includes frequent idling, heavy loads, dusty environments, and extreme temperatures.

Many fleet operators utilize oil analysis to determine optimal oil change intervals, potentially extending them beyond standard recommendations while ensuring engine health.

Drain plug torque

The drain plug torque specification is crucial for preventing leaks and damage to the oil pan.

• PACCAR MX-13: Consult your service manual or dealer for the exact torque specification. Usually in the range of 50-60 ft-lbs.
• Cummins ISX15: Consult your service manual or dealer for the exact torque specification. Often around 59 ft-lbs (80 Nm).

Always use a new crush washer with each oil change. Reusing crush washers can lead to oil leaks.

How to change the oil

Changing the oil on a Kenworth T680 is similar to other heavy-duty trucks but requires appropriate equipment for the large volumes of oil.

1. Preparation: Park the truck on a level surface, engage the parking brake, and allow the engine to cool slightly but still be warm. Gather your tools, new oil, oil filters, drain pan (large enough for 38-48 quarts!), and a new crush washer.
2. Drain Oil: Locate the oil drain plug(s) (some engines may have more than one). Place your large drain pan underneath and remove the plug(s). Allow the oil to drain completely.
3. Replace Filter: While the oil is draining, remove the old oil filter(s). Some engines may have cartridge-style filters that require specific tools. Ensure all gaskets and seals from the old filter are removed. Apply a thin film of new oil to the gasket of the new filter(s) before installing. Hand-tighten the new filter(s) until snug, then turn an additional 3/4 to 1 full turn (or follow filter manufacturer's instructions).
4. Install Drain Plug: Once the oil has finished draining, clean the drain plug and the mating surface on the oil pan. Install the new crush washer and reinstall the drain plug(s), torquing to the manufacturer's specification.
5. Add New Oil: Remove the oil fill cap and slowly add the recommended amount and type of new engine oil. Start with a slightly lower amount and check the dipstick.
6. Check Level: Start the engine and let it run for a few minutes to circulate the new oil. Check for any leaks around the drain plug and oil filter(s). Shut off the engine, wait 10-15 minutes for the oil to settle, then recheck the oil level on the dipstick. Add more oil if necessary until it reaches the full mark.
7. Reset Maintenance Light: Consult your owner's manual or service information for instructions on resetting the oil life monitor or maintenance light, if applicable.

Common issues / tips

• Oil Analysis is Key: For heavy-duty applications like the T680, regular oil analysis can provide valuable insights into engine health and help optimize oil drain intervals, saving money and reducing waste.
• Large Capacities: Be prepared for the significant volume of oil involved. Ensure you have adequate drain pans and disposal methods.
• Multiple Filters: Some heavy-duty engines use multiple oil filters (spin-on, bypass, or cartridge-style). Always replace all recommended filters during an oil change.
• Fuel Dilution: Diesel engines, especially with modern emissions systems (DPF regeneration), can be susceptible to fuel dilution in the engine oil. Oil analysis can detect this, which necessitates earlier oil changes.
• Aftermarket Sensors: If your truck has aftermarket oil pressure or temperature sensors, ensure they are compatible with the recommended oil type and filter. Consult your dealer or service manual.

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