Where the oil filter sits on your Dodge Ram 1500

On a Dodge Ram 1500, the oil filter is mounted on the driver's side of the engine, below the valve cover. The exact location depends on your engine type — if you have a V8, it sits lower and more toward the front; if you have a V6, it's positioned slightly higher. You'll see it as a cylindrical canister about the size of a soda can, with a threaded base that screws into the engine block.

The filter is easier to reach than on many trucks because Dodge positioned it outboard rather than tucked deep in the engine bay. You may still need to remove the plastic undertray or wheel well liner on the driver's side to get clear access, depending on your model year. Once you locate it, you'll see why it's the first thing to drain when you change your oil — it's positioned so old oil drips straight down and away from other engine parts.

Key Takeaways

  • The oil filter on a Dodge Ram 1500 screws onto the driver's side of the engine block, below the valve cover, and is accessible without removing major engine components.
  • Mopar filters (Dodge's parts brand) are the manufacturer's choice, but Fram, Wix, and ACDelco filters also fit and meet the same specifications.
  • You need a filter wrench to unscrew the old filter safely — hand-tightening alone will not give you enough grip, and the filter will spin without one.
  • The filter should be hand-tight only when you install the new one; over-tightening with a wrench will crack the seal and cause leaks.
  • Changing the filter takes 10 to 15 minutes once you have the right wrench and a drain pan positioned underneath.

What filter size and type your Ram 1500 needs

The filter size depends on your engine and model year. Most Ram 1500 trucks from 2009 onward use a Mopar filter number 68157291AA or 68157291AB, which are both the same size and thread pattern. If you have a 2019 or newer model with the 3.0-liter EcoDiesel engine, you'll need a different filter — the Mopar 68157291AA still fits, but confirm this with your parts supplier before buying.

You don't have to buy a Mopar filter. Fram, Wix, and ACDelco all make filters that fit the same threads and meet Dodge's specifications. The main difference is the filter media (the material inside that traps dirt) and the bypass valve pressure — all three brands are reliable, and the choice usually comes down to price and what your local parts store stocks. If you're unsure which aftermarket filter matches your truck, bring your VIN to the parts counter and they'll look it up in their system.

The filter threads are the same across most Ram 1500 generations, but the canister diameter can vary slightly. A filter that's too large may hit the frame or suspension components when you tighten it. This is rare with major brands, but it's why confirming your specific model year and engine size matters before you buy.

Tools and supplies you'll need

You need a filter wrench, a drain pan, and a new filter. The filter wrench is the most important tool — it's a metal or rubber band that wraps around the filter canister and gives you leverage to unscrew it. Fram, Bosch, and OTC all make wrenches that fit standard-size filters; they cost $8 to $15 and are reusable. If you don't have a wrench, you can wrap a rubber strap or old belt around the filter and turn it, but this is slower and harder on your hands.

A drain pan catches the old oil as it drains. Any container that holds at least 5 quarts will work — a plastic oil drain pan from an auto parts store costs $5 to $10 and is designed to pour used oil back into a jug for recycling. You'll also want a rag or old towel to wipe your hands and catch drips as you unscrew the filter.

Some people use a filter socket (a hollow socket that fits over the filter canister) instead of a band wrench. These work well if you have an impact wrench or a breaker bar, but they take up more space in the engine bay. A band wrench is usually the faster choice for a Ram 1500 because the filter is accessible and not deeply recessed.

Steps to remove the old filter

First, warm up your engine for a minute or two so the oil flows more easily, then turn it off and wait five minutes. This makes the old oil drain faster and more completely. Place your drain pan underneath the filter — position it so the pan catches the drip as the filter unscrews, not after.

Wrap your filter wrench around the canister near the base, where it's thickest and strongest. Turn the wrench counterclockwise slowly at first — the filter will resist because it's sealed tight. Once it breaks loose, you can unscrew it by hand. Let the old oil drain into the pan for a minute or two, then set the filter aside in a safe place (it will still be warm and full of oil).

Wipe the threaded base on the engine block with a clean rag. You'll see a rubber O-ring seal left behind — make sure it comes off with the old filter. If it sticks to the engine block, peel it off by hand. A stuck O-ring will prevent the new filter from sealing properly and cause leaks.

Installing the new filter correctly

Before you screw on the new filter, coat the rubber O-ring on the new filter's base with a thin layer of fresh oil. This helps the seal compress evenly and prevents the O-ring from tearing as you tighten it. Use your finger to rub a small amount of new oil around the O-ring — you don't need much, just enough to wet it.

Screw the new filter onto the threaded base by hand. Turn it clockwise until the O-ring touches the engine block, then stop. From that point, turn the filter an additional three-quarter turn (about 270 degrees) by hand. This compresses the O-ring enough to seal without crushing it. Do not use a wrench to tighten the new filter — over-tightening will deform the O-ring and cause leaks.

If you over-tighten and the filter leaks, you'll see oil dripping from the base within a few minutes of starting the engine. If this happens, let the engine cool, unscrew the filter, replace the O-ring, and reinstall it with less force. Most leaks from new filters are caused by over-tightening, not by a defective filter.

What to do with the old filter

Used oil filters contain residual oil and should not go in the trash. Most auto parts stores that sell filters will take your old filter for free — some require you to buy a new filter from them, but many accept filters from anywhere. Call ahead to confirm, or ask when you buy your new filter.

If you can't find a store that takes filters, check with your city or county hazardous waste program. Many offer collection days where you can drop off used filters, batteries, and other automotive waste at no cost. Some recycling centers also accept filters year-round.

Common mistakes to avoid

The most common mistake is forgetting to remove the old O-ring seal before installing the new filter. If two O-rings stack on top of each other, the new filter won't seal properly and will leak. Always wipe the threaded base and check that the old O-ring came off with the old filter.

The second mistake is over-tightening the new filter with a wrench. The filter canister is thin metal and will crack if you squeeze it too hard. Hand-tight plus three-quarter turn is the correct amount — if you're worried you haven't tightened it enough, start the engine and watch for leaks. A properly installed filter will not drip.

A third mistake is forgetting to refill the oil after you change the filter. The new filter holds about half a quart of oil, so your total oil level will drop. Check your dipstick or use the electronic oil monitor in your dashboard to confirm you're at the correct level before you drive.

Frequently Asked Questions

How often should I change the oil filter on my Ram 1500?

Most Dodge Ram 1500 owners change the filter every time they change the oil. Modern synthetic oils can go 7,500 to 10,000 miles between changes, while conventional oil typically needs a change every 3,000 to 5,000 miles. Your owner's manual will specify the interval for your engine type and oil grade.

Can I change the filter without draining the oil?

Yes, you can change the filter alone without draining the oil. The filter holds only about half a quart, so you'll lose a small amount of oil when you unscrew it, but the engine oil itself stays in the pan. This is useful if you're just replacing a clogged filter between full oil changes, though most people change both at the same time.

What if the filter wrench doesn't fit?

If a band wrench is too loose or too tight, try a different size or style. Fram and OTC make adjustable wrenches that fit a range of filter sizes. If you don't have a wrench available, you can carefully use a screwdriver to puncture the filter canister and pry it off, but this is messy and risks damaging the threaded base. A wrench is worth the small cost.

Is it normal for a little oil to leak after I install a new filter?

A few drops during installation are normal as the O-ring settles. If oil continues to drip after you start the engine and let it run for a minute, the filter is over-tightened or the O-ring is damaged. Turn off the engine, let it cool, and loosen the filter by half a turn. If it still leaks, remove the filter and check that the old O-ring came off completely.

Do I need to prime the new filter with oil before installing it?

Priming (filling the new filter with oil before screwing it on) is optional and doesn't significantly affect engine performance on a Ram 1500. Some people do it to reduce the time the engine runs without full oil pressure after a cold start, but modern engines tolerate a few seconds of lower pressure without damage. If you do prime it, be careful not to spill oil into the engine bay.