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AMSOIL Fuel Filters
Donaldson P-Series Heavy-Duty Fuel Filters keep diesel fuel clean and dry to protect injectors, pumps, and engines. Clean fuel helps modern high-pressure diesel fuel systems avoid expensive repairs and unplanned downtime.
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The Donaldson P-Series Heavy-Duty Fuel Filters is a fuel filter and water separator line, stocked through the AMSOIL catalog for service on vehicles and equipment that do not use AMSOIL-branded filters. Donaldson P-Series is the brand's heavy-duty fleet line, used on Class 7 and Class 8 trucks, off-road construction and mining equipment, agricultural tractors, generators, and similar professional applications. The line emphasizes long service intervals, robust construction, and validated efficiency under sustained load.
Choose the vehicle or equipment first, then select the matching filter code for the exact year, make, model, and engine. The cross-reference result is what matters at order time.
The Donaldson P-Series Heavy-Duty Fuel Filters line handles removing water, microbial contamination, and particles from diesel and gasoline fuel before they reach the injection pump and injectors. Filtration at this point in the system is the deciding factor between long, predictable component life and premature failures driven by contamination that would otherwise reach internal surfaces.
This line is used on heavy-duty over-the-road diesel trucks, light-duty diesel pickups, off-road construction and agricultural equipment, marine diesel engines, and gasoline applications using a serviceable inline or in-tank fuel filter. The exact part number for a particular application is set by the lookup result for the year, make, model, and engine in question. Substituting a same-brand part with different dimensions or media because the part numbers look similar usually does not work; the cross-reference is specific.
Confirm the right cross-reference for the vehicle or equipment in the AMSOIL filter lookup resources before ordering. The matching lubricant program is in the AMSOIL diesel oil guide. The original-equipment filter part number from the owner's manual or the existing service record is also a good starting point and will usually return a clean cross-reference within this brand line.
Replace fuel filters at the interval the engine manufacturer specifies and at the first sign of restriction (low fuel pressure, hard starting, or a check-engine code for fuel system performance). Documenting the installed part number and the service date in the maintenance log keeps future cross-references accurate and prevents confusion when similar codes show up under multiple brand lines.
For applications where AMSOIL publishes a matching in-house filter, the matching fuel filter cross-reference for the engine is generally the preferred choice because it is engineered around AMSOIL synthetic lubricants and the extended-drain intervals those lubricants support. The Donaldson P-Series Heavy-Duty Fuel Filters line is the right choice when the application is outside the AMSOIL filter coverage, when the OEM specifies one of these brands, or when the existing service record already runs this line and the maintenance program is already set up around it.
The Donaldson P-Series Heavy-Duty Fuel Filters line is sold through the AMSOIL catalog with individual cross-reference codes selected at order time. Filters are backed by the brand's standard warranty as supplied through AMSOIL. Confirm the right code for the vehicle or equipment with the AMSOIL filter lookup resources, then order the Donaldson P-Series Heavy-Duty Fuel Filters.
AMSOIL stocks the Donaldson P-Series Heavy-Duty Fuel Filters line so customers running this brand on a particular vehicle or piece of equipment can order both the lubricants and the filters from the same supplier. For applications where AMSOIL also publishes a matching in-house filter, the AMSOIL line is generally the recommended choice; the Donaldson P-Series Heavy-Duty Fuel Filters line covers the rest of the catalog where AMSOIL does not publish a matching cross-reference.
Match the year, make, model, and engine of the vehicle or equipment to the cross-reference in the AMSOIL lookup, or cross from the existing OEM filter part number. Substituting a same-brand part with similar dimensions but different media or fittings is not a substitute; the published cross-reference is what matches the application.
No. Using a published cross-reference filter that meets the OEM specification does not void a new vehicle or equipment manufacturer warranty. The Magnuson-Moss Warranty Act protects the owner from a warranty denial based solely on aftermarket part choice when the part meets the OE specification.
Replace fuel filters at the interval the engine manufacturer specifies and at the first sign of restriction (low fuel pressure, hard starting, or a check-engine code for fuel system performance). The actual interval depends on the application and the operating environment; severe-service conditions call for shorter intervals than the published baseline.
Yes. The filter line and the AMSOIL synthetic lubricant program are independently engineered and work together without compatibility issues. When AMSOIL publishes a matching in-house filter for the application, that filter is generally the recommended choice for the longest-supported drain interval; otherwise this line is the right cross-reference.
Yes. The Donaldson P-Series Heavy-Duty Fuel Filters line carries the brand's standard warranty as supplied through AMSOIL. Defective parts can be returned through the AMSOIL Return Policy when unopened and within the published return window.