Air Filter Restriction Indicator

I do every 250k on my 379

 

I change mine every year, usually in October. That’s how I remember to. A flashlight inside to check how dirty they are works good. One sure way to tell, is to check fuel mileage real close. I usually gain .20 mpg or more. Fuel savings pay for the filters, (usually around $100) within a couple weeks. I don’t know what’s suggested on newer Trucks. 100k for duals is always what I was told. Less for single under hood filters. I’ve often considered getting a single, and leaving the duals as dummies, just for looks. Also considered changing each dual at 50k. Keeping it more consistent. Makes sense to me anyways. Dirty filters cause early turbo failure, decreased mpg’s, higher egt’s, leading to cracked charge air coolers. I’m a cheapskate, that’s why I bite the bullet and replace them. Even if I haven’t ran many miles. Filters get dirty from parking lot dust. Shop around, prices can be found for half that others charge. Sometimes it’s the Dealership with the best price. Last ones I bought were at All Truck in Baton Rouge. $45 each. Some places want $110 each. It’s one of those things. Always had been. Prices all over the place, always changing suppliers and prices. If I trusted the gauge on the dash, they’d never get changed. Small under hood ones I had in the past were worse. They could be reset, and not show clogged again for a long time. A flashlight inside, compared to the new ones tells the story. They’re dirtier than you think.