AIR FILTERS

Air Filters For Peterbilt Trucks

Clean intake air is critical for engine performance and longevity in any Peterbilt truck. Air filters trap dust, dirt, and debris before they can enter the engine and cause premature wear to cylinders, pistons, and turbocharger components. Whether you're running a PACCAR MX-13 or a Cummins X15, replacing your air filter on schedule is one of the simplest and most cost-effective maintenance steps you can take to protect your investment.

Frequently asked questions about air filters

How often should I replace the air filter on my Peterbilt?

Most manufacturers recommend replacing the primary air filter every 30,000 to 50,000 miles under normal driving conditions. However, if you operate in dusty environments like construction sites or gravel roads, you may need to replace it more frequently. Check the filter restriction indicator on your truck for a real-time reading.

What is the difference between a primary and secondary air filter?

The primary filter is the main element that captures the bulk of airborne contaminants. The secondary filter, also called the safety element, sits behind the primary and acts as a backup to catch fine particles if the primary is damaged or during filter changes. The secondary filter should be replaced at every other primary filter change.

Can a dirty air filter affect fuel economy?

On modern diesel engines with electronic fuel injection, a dirty air filter primarily affects turbo boost pressure and power output rather than fuel economy directly. However, a heavily restricted filter forces the engine to work harder under load, which can increase fuel consumption over time. Keeping a clean filter ensures the engine breathes efficiently.

Other parts you might need

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