Improve your semi-truck with top-quality air cleaner filters. With universal fit options, they offer optimal solutions for various semi-truck models. Keep your truck running at its best with these durable, high-performing air filters.
Frequently Asked Questions About Semi-Truck Air Cleaner Filters
What air filter dimensions do I need for my specific truck model?
Air filter dimensions vary significantly between truck makes and models. Most common sizes include 11" x 11", 15" x 15", and 20" x 20" for square filters, while round filters typically range from 9" to 15" in diameter. To find your exact size, check your current filter for a part number, measure the filter housing opening, or reference your truck's manual. Popular models like Peterbilt 379/389 typically use 15" round filters, while Kenworth W900 often requires 20" x 20" square filters. When in doubt, provide your truck's year, make, model, and engine type for accurate sizing.
How often should I replace my semi-truck air filter, and what are the warning signs?
Standard replacement intervals range from 25,000 to 50,000 miles for primary filters and 50,000 to 100,000 miles for secondary filters, but this varies based on operating conditions. Dusty environments, construction sites, or unpaved roads require more frequent changes. Warning signs include decreased fuel economy (2-3 MPG drop), black smoke from exhaust, reduced engine power during acceleration, or visible dirt buildup when inspecting the filter. Many drivers in dusty conditions check filters monthly and use compressed air to extend filter life between replacements.
What's the difference between OEM and aftermarket air filters, and which performs better?
OEM filters guarantee exact fit and meet original equipment specifications but typically cost 30-50% more than aftermarket options. Quality aftermarket brands like Donaldson, Baldwin, and Fleetguard often match or exceed OEM performance at lower prices. Key differences include filtration efficiency (look for 99.9% efficiency ratings), dust holding capacity (measured in grams), and airflow ratings (CFM). Many fleet operators successfully use aftermarket filters without issues, but ensure any aftermarket filter meets or exceeds your engine manufacturer's specifications to maintain warranty coverage.
Can I clean and reuse my air filter, or should I always replace it?
Paper element filters can be cleaned 3-4 times maximum using compressed air (blow from inside out at 30 PSI max), but each cleaning reduces efficiency by approximately 20%. Never use water, solvents, or oil on paper filters. Washable filters like those from aFe or K&N can be cleaned indefinitely with proper cleaning kits, though they require 4-8 hours drying time. Most fleet mechanics recommend replacement over cleaning for primary filters due to labor costs and potential engine damage from improper cleaning. Secondary safety filters should always be replaced, never cleaned.
Do high-flow or performance air filters actually improve fuel economy and horsepower?
High-flow filters can provide modest improvements of 1-3% in fuel economy and 5-15 horsepower gains, primarily by reducing intake restriction. However, these gains often come with trade-offs in filtration efficiency. Standard OEM-spec filters typically filter 99.9% of particles above 10 microns, while some performance filters may only achieve 95-98% efficiency. For trucks operating in clean highway conditions, performance filters can be beneficial, but trucks in dusty environments should prioritize filtration over flow. Always verify that any performance filter maintains adequate filtration for your engine's requirements.
