Peterbilt Truck Filters Guide

Peterbilt at a Glance

Peterbilt Motors Company was founded in 1939 in California and has been part of PACCAR since 1958. Today it is headquartered in Denton, Texas, and is known for premium Class 8 trucks, from the aerodynamic Model 579 long-haul tractor to the classic long-hood Model 389. Peterbilt trucks are common in long-haul, regional, vocational, and owner-operator trucking across North America, so their filters are among the most requested in the heavy-duty aftermarket.

Peterbilt Engines and Why They Matter for Filters

The Peterbilt 579 and Kenworth T680 are both built with the PACCAR MX-13, and share the same engine filters. Peterbilt trucks are also available with Cummins engines, which use a different filter set. Identify the engine first, then the model.

Common Peterbilt Filter OE Numbers

While exact filter part numbers depend on the specific engine series and build, the following numbers appear frequently in Peterbilt maintenance:

Oil Filters

• WIX 57370 – A widely used oil filter for the PACCAR MX-13 in the Peterbilt 365, 367, 384, 387, 567 and 579, cross-referenced to Baldwin P40019 and P7354 and Donaldson P550812
• Fleetguard LF14000NN (Cummins 4367100) – The standard spin-on lube filter for the Cummins X15 and ISX15
• Fleetguard LF14001NN – Companion lube filter number for the Cummins X15

Fuel Filters and Water Separators

• K37-1009 – Fuel/water separator element for the PACCAR MX-13, cross-referenced to WIX WF10250 and Hastings FF1287
• K37-1021 (Fleetguard FS20207) – 10-micron fuel filter for the MX-13 and Cummins ISX15 and ISX12 in the 365, 367, 384, 389, 567, 579 and 587
• K37-1029, K37-1012 and K37-1011 (Fleetguard FS20172, Donaldson P581298) – Fuel filters listed for the 365, 367, 384, 389, 520, 567, 579 and 587
• Baldwin PF9928 – Fuel filter element for Peterbilt trucks with the MX-13
• Fleetguard FF5825NN (Cummins 5365988) and FF5971N (Cummins 5575143) – Stage 2 fuel filters for the Cummins X15
• Fleetguard FS19764 (Cummins 102527) – Stage 1 fuel/water separator for the Cummins X15

Air Filters

• P621725 – Primary air filter for the Peterbilt 567 and 579 with MX-11, MX-13 and Cummins ISX15, cross-referenced to Donaldson P637453, Baldwin PA32000, Fleetguard AF24302, and WIX WA11058
• P621730 (Donaldson P637454) – Companion air filter for the 567 and 579
• Fleetguard AF4197 (PACCAR X011622) – Air filter for the Peterbilt 389
• Fleetguard AF4195 (PACCAR P614986) – Air filter for the Peterbilt 367

Crankcase, Cabin, and Other Filters

• 2299013 (also 2116817PE and 2176887PE) – Crankcase filter kit for the PACCAR MX-13 in the Peterbilt 567 and 579
• X1987001 – Cabin air filter set listed for the Peterbilt 567 and 579
• Fleetguard UF106 (Cummins 4388378) – DEF filter for the Cummins X15

These numbers are useful references when identifying the correct replacement. Always confirm the exact filter by engine serial number, VIN, or existing filter part number when possible.

Peterbilt Cross-Reference Quick Table

Peterbilt Filter Maintenance

Oil filters. Replace the oil filter with every oil change. Severe-duty and high-idle operation need shorter intervals than low-idle line haul. Follow the oil specification for the engine and emission level.

Fuel filters. Replace the fuel/water separator and main fuel filter together, drain the separator regularly, and prime the system after replacement. Genuine or equivalent-quality filters matter because low-pressure fuel faults and injector damage are costly.

Air filters. Replace the primary element when the restriction gauge shows it is required. The 389 and 367 use different air filter numbers from the 579 and 567, so check the model before ordering.

Crankcase and DEF filters. Replace the crankcase ventilation filter on MX-13 engines and the DEF filter on SCR systems on schedule.

Cabin filters. Replace cabin air filters at least once a year. Cabin filter numbers and locations differ between Peterbilt and Kenworth models, so confirm the number for your truck.

Service intervals depend on the engine model, emission standard, oil specification, duty cycle, idle time, and the manufacturer's maintenance schedule. Always follow the schedule for your specific truck.

How to Identify the Correct Peterbilt Filter

• Confirm the engine make and model from the engine data plate or VIN.
• Note the model year and emission level, since filters change between them.
• Record the model (579, 567, 389, 367 and so on), especially for air and cabin filters.
• Compare the old filter's number, height, diameter, and thread against the replacement.

Frequently Asked Questions

What oil filter does a Peterbilt 579 use? Catalogs commonly list WIX 57370 for 579 trucks with the PACCAR MX-13, and Fleetguard LF14000NN for trucks with the Cummins X15. Verify by engine.

Does the Peterbilt 579 use the same filters as the Kenworth T680? For engine filters, usually yes, since both use the PACCAR MX-13. Cabin filters and some air filters can differ by model.

What air filter does a Peterbilt 389 use? Fleetguard AF4197 (PACCAR X011622) is listed for the 389, while the 367 uses AF4195. Verify by model year and engine.

Can aftermarket filters be used on Peterbilt trucks? Yes, if they meet or exceed the original specification for efficiency, flow, and pressure rating and come from a manufacturer able to supply test data. Check warranty terms on newer trucks.

For fleets, owner-operators, and distributors sourcing replacement filters for Peterbilt trucks, ADAOER Filter manufactures fuel, oil, air, cabin, and hydraulic filters for trucks, buses, and heavy machinery, and supports OEM/ODM development for custom specifications. Cross-reference lists are available on request.

Brand names and part numbers are used for identification and compatibility reference only. Kenworth, Peterbilt, Mack, PACCAR, Volvo, Cummins, Fleetguard, Donaldson, Baldwin, WIX, Luber-finer, Hastings, and Mann-Hummel are trademarks of their respective owners. Part numbers vary by engine, emission standard, and production date, so always verify the correct filter against the engine model, the truck's VIN, and the existing filter before ordering.