Filter Guides

Practical reference material for checking filter part numbers and applications. Always confirm the specific equipment and component before ordering.

How to Cross-Reference OEM Semi Truck Filter Part Numbers

Learn how to match OEM filter numbers to Baldwin, Fleetguard, Donaldson, WIX, and other interchanges without guessing fitment.

A practical overview of Cascadia filtration — air elements, Detroit fuel/water separators, and oil service kits.

How Volvo VNL D11/D12/D13 oil, fuel, and air filtration stacks work — including bypass oil filters and FS20313 separators.

Paccar T680 and 579 trucks share many air and fuel filtration designs. Here is how to match the right element.

How to identify DAVCO Fuel Pro and Diesel Pro housings and pick the correct fuel/water separator element.

Understand why many Volvo and Mack diesels use both a full-flow and a bypass oil filter — and when each is due for service.

Cabin/HVAC filters protect driver air quality. Here is when to replace them and what to watch for on long-haul trucks.

A simple stocking model for fleets: prioritize high-turn oil/fuel elements, keep air filters by airbox family, and standardize cross-refs.