Donaldson P550949 Oil Filter | Cummins X15, ISX & Heavy-Duty Diesel Engines

Donaldson P550949 Full-Flow Oil Filter for Cummins X15 & ISX Engines

The Donaldson P550949 Oil Filter is a premium full-flow spin-on lube filter engineered to provide exceptional engine protection for Cummins X15, Cummins ISX, and other heavy-duty diesel engine applications. Built with Donaldson's advanced synthetic filtration media, the P550949 delivers superior contaminant removal, extended service life, and maximum lubrication system protection.

Designed for today's high-performance diesel engines, the Donaldson P550949 helps remove harmful particles, soot, and contaminants before they can cause premature wear to critical engine components. Its synthetic media construction offers significantly greater contaminant holding capacity compared to conventional cellulose filters, making it ideal for owner-operators, fleets, and extended maintenance intervals.

Commonly used in Freightliner Cascadia, Peterbilt 579, Kenworth T680, Western Star, and International trucks equipped with Cummins X15 and ISX engines, the P550949 is trusted throughout the trucking industry for dependable filtration performance.

Key Features

• Premium full-flow lube oil filter
• Advanced synthetic filtration media
• 99% efficiency at 30 microns
• Twice the contaminant holding capacity of standard cellulose filters
• Designed for extended maintenance programs
• Excellent cold-flow performance
• Heavy-duty construction for severe-duty applications
• Spin-on design for easy installation
• Compatible with Cummins X15 and ISX engines

Specifications

• Part Number: P550949
• Brand: Donaldson
• Filter Type: Full-Flow Lube Oil Filter
• Style: Spin-On
• Media Type: Synthetic
• Outer Diameter: 4.65"
• Height: 11.69"
• Thread Size: M95 x 2.5
• Absolute Micron Rating: 15 Microns

Benefits of Replacing Your Oil Filter

• Cleaner engine oil
• Reduced engine wear
• Improved turbocharger protection
• Longer engine life
• Supports extended oil drain intervals
• Reduced maintenance costs
• Maximum engine reliability
• Improved fleet uptime

Signs Your Oil Filter Needs Replacement

• Low oil pressure
• Dirty engine oil
• Excessive soot contamination
• Engine noise during startup
• Reduced fuel efficiency
• Scheduled PM interval reached
• Oil analysis indicating contamination

Common Applications

• Cummins X15 Engines
• Cummins ISX Engines
• Freightliner Cascadia
• Kenworth T680
• Kenworth W900
• Peterbilt 579
• Peterbilt 389
• Western Star 5700XE
• International LT Series
• Vocational & Fleet Trucks

The Donaldson P550949 is commonly used in Freightliner, Kenworth, and International applications operating in long-haul, regional, vocational, and heavy-duty service environments.

Major Cross Reference Numbers

The Donaldson P550949 crosses with many of the most popular heavy-duty oil filters in the industry:

• Donaldson P559000
• Fleetguard LF14000NN
• Fleetguard LF9001
• Fleetguard LF9018
• Fleetguard LF9080
• Baldwin BD7154
• Baldwin BD7355
• Baldwin BD50000
• Luber-Finer LFP9001
• WIX 57746XD
• Mann WP12120
• TruckPro DNP550949
• Fram PH8691A
• ACDelco PF1269
• John Deere RE574468
• Cummins 2882673
• Cummins 2882674
• Cummins 4331005
• Cummins 4367100
• Volvo 85114044

Additional OEM and aftermarket interchange numbers include 2874490, 3101868, 3101869, 3406809, 3406810, 4136480, 57746, 84746XD, ABPN10GLF9001, and many others.

Why Choose Donaldson Filtration?

Donaldson has been a trusted name in heavy-duty filtration for decades. The P550949 utilizes synthetic media technology that provides superior contaminant capture and longer service life compared to conventional filters. This helps maintain cleaner oil, reduce engine wear, and protect expensive engine components throughout the service interval.