Oil Filters

Doc's Diesel Oil Filters

Because Your Engine Is Only as Clean as Its Oil.

Diesel engines are brutal on oil. Soot, metal shavings, and combustion byproducts load up the crankcase faster than in any gas engine—and every contaminant your filter misses is grinding away at bearings, journals, and turbo internals with each pass. Doc's Diesel Premium Oil Filters are built for that reality. With a high-flow synthetic media blend rated at 25 microns and 99% efficiency, they capture more contaminants and hold more dirt than standard cellulose filters, keeping oil flowing clean through hard-working Cummins, Powerstroke, and Duramax engines. Cleaner oil means less friction, less wear, better fuel efficiency, and an engine that's still pulling strong when lesser trucks are in the shop.

Built to OEM Specs. Backed by the Doc's Fitment Guarantee.

Every Doc's oil filter is engineered to meet or exceed OEM requirements and rigorously tested for efficiency, capacity, and burst strength—because a filter that fails under pressure is worse than no filter at all. The heavy-duty metal housing stands up to the oil pressures diesel engines generate, the anti-drain back valve keeps oil in the filter between starts to protect against dry-start wear, and the spring-activated pressure relief valve ensures your engine never gets starved of oil, even with a cold, thick crankcase on a winter morning (valves included when applicable to your filter design). And whether you run full synthetic, conventional, or a blend, Doc's filters are built for all three. With our Fitment Guarantee, if it doesn't fit your engine, we'll make it right. No guesswork. No BS.

Doc's Makes It Easy to Find the Right Filter.

Not sure which oil filter fits your rig? Use our Vehicle Selection Tool—enter your year, make, and model, and we'll pull up the exact filter built for your engine. And once it's installed, stay ahead of the interval: plan on changing your oil filter every 5,000 to 7,000 miles, or 10,000 to 15,000 miles maximum, and lean toward the early end if you tow, haul, or idle heavy. A filter is the cheapest insurance your engine will ever get—don't stretch it.

Free Shipping on All U.S. Orders $99+

At Doc's Diesel, we know oil changes come around fast on a truck that works. That's why plenty of our customers grab two or three filters at a time—or pair one with a Filter Kit or Oil Change Kit to knock out the whole service in one order. Every order over $99 ships free anywhere in the U.S., so stock the shelf and skip the parts store run. Clean oil. Protected engine. That's the Doc's way.