Technical Filtration Guides
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.
Freightliner Cascadia Oil, Fuel & Air Filter Basics
A practical overview of Cascadia filtration — air elements, Detroit fuel/water separators, and oil service kits.
Volvo VNL / D13 Filtration Overview
How Volvo VNL D11/D12/D13 oil, fuel, and air filtration stacks work — including bypass oil filters and FS20313 separators.
Kenworth T680 & Peterbilt 579 Shared Platform Filters
Paccar T680 and 579 trucks share many air and fuel filtration designs. Here is how to match the right element.
Fuel Pro / Diesel Pro Filter & Water-Separator Guide
How to identify DAVCO Fuel Pro and Diesel Pro housings and pick the correct fuel/water separator element.
Bypass vs Full-Flow Oil Filters on Heavy-Duty Diesels
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 Air Filters for Semi Trucks — When to Replace
Cabin/HVAC filters protect driver air quality. Here is when to replace them and what to watch for on long-haul trucks.
Fleet Buying Guide: Stocking Oil, Air & Fuel Filters
A simple stocking model for fleets: prioritize high-turn oil/fuel elements, keep air filters by airbox family, and standardize cross-refs.
Filter Types
Need Cross-Reference Help?
Provide your engine serial number or existing filter brand part number, and our team will identify the verified CORALFLY SKU.
Ask a Filter Specialist
