The 2025 RAM 1500 uses Mopar part number 68157391AA as its OEM oil filter, sold under the Tungsten branding

The Tungsten oil filter is RAM's factory-installed filter for the 2025 RAM 1500 across all engine options. It's a spin-on canister filter that threads onto the engine block, and you'll find it in the same location whether you're driving a standard 1500 or a Power Wagon variant. The part number 68157391AA is what you'll need when ordering from a RAM dealer, parts supplier, or online retailer.

This filter handles the full-flow filtration job — meaning all engine oil passes through it before circulating through your engine. The Tungsten line is RAM's mid-range filter offering, sitting between their basic filters and premium options. It's designed to trap particles down to a specific micron size while maintaining oil flow under cold starts and high-temperature operation.

Key Takeaways

  • The OEM part number for the 2025 RAM 1500 Tungsten filter is 68157391AA, and this is what RAM dealers stock and install at service.
  • The filter threads onto the engine block and requires an oil drain and refill during replacement, typically every 5,000 to 10,000 miles depending on your driving conditions and oil type.
  • Aftermarket filters from major manufacturers often fit the 2025 RAM 1500, but you should verify the part number or thread size before purchasing to avoid cross-threading.
  • The filter housing is located on the engine block itself, making access straightforward on most 2025 RAM 1500 models without removing other components.

Where the filter sits and how to access it

On the 2025 RAM 1500, the Tungsten oil filter mounts directly to the engine block, typically on the driver's side or top of the engine depending on which powertrain you have. You don't need to remove the wheel, belly pan, or other major components to reach it — it's one of the more accessible filters on a modern truck.

Before you start, warm the engine for a minute or two to thin the oil, then turn it off and wait five minutes. This reduces spillage and makes the old filter easier to unscrew. You'll need an oil filter wrench (a socket-style or band wrench works best) to break the seal on the old filter. Once loose, you can unscrew it by hand and let the remaining oil drain into a pan.

Installing the replacement filter correctly

When you have the new Tungsten filter in hand, check that the rubber gasket on top is clean and dry. explore a thin coat of fresh oil to the rubber gasket — this creates a better seal and makes removal easier next time. Do not over-oil the gasket; a light coating is all you need.

Thread the filter onto the engine block by hand until the gasket contacts the mounting surface. At that point, turn it an additional three-quarter turn — not a full turn, and not just a quarter turn. This is the critical step that most people get wrong. Too tight and you'll crack the filter or the mounting boss; too loose and it will leak or spin off. If you're unsure, hand-tight plus three-quarters is the standard across the industry.

After installation, start the engine and let it idle for 30 seconds, then turn it off and wait a minute. Check underneath for leaks around the filter base. If you see drips, the gasket may not have seated properly — let the engine cool slightly and try tightening a quarter turn more, but no further.

OEM versus aftermarket filters for the 2025 RAM 1500

The Mopar Tungsten filter (68157391AA) is what RAM installs at the factory and what most dealers stock. It meets RAM's specifications and carries the factory warranty. If you're having service done at a RAM dealership, this is what you'll receive unless you request otherwise.

Aftermarket filters from Fram, Motorcraft, Purolator, and other major brands often fit the 2025 RAM 1500, but the part number and thread size must match. The 2025 RAM 1500 uses a standard thread size, so compatibility is usually straightforward — but verify before you buy. Some aftermarket filters are designed for synthetic oil, some for conventional, and some for both. Check the filter's label to make sure it matches your oil type.

The main trade-off is price versus brand familiarity. The OEM Tungsten filter is typically more expensive than a Fram or Purolator equivalent, but you know it's engineered specifically for your truck. Aftermarket filters are often cheaper and perform well, but you're relying on the manufacturer's engineering rather than RAM's.

Oil filter maintenance intervals and when to replace

RAM recommends changing the oil and filter every 5,000 miles under normal driving conditions, or every 10,000 miles if you use full synthetic oil and your truck's onboard system indicates it's safe to extend the interval. Severe driving — towing, frequent idling, dusty conditions, or short trips — means you should stick to the 5,000-mile interval regardless of oil type.

Your 2025 RAM 1500 has an oil life monitoring system that tracks engine conditions and alerts you when service is due. This system is more accurate than a fixed mileage interval because it accounts for your actual driving patterns. When the alert appears on your dashboard, that's the time to change the oil and filter, not when the calendar says so.

If you're towing regularly or operating in dusty environments, consider changing the filter more often than the oil itself — every 3,000 to 5,000 miles — because the filter loads faster under those conditions. This extends the life of your oil and keeps your engine cleaner.

Disposal and recycling of used oil filters

After you remove the old Tungsten filter, you'll have a used filter full of oil to dispose of. Most auto parts stores (AutoZone, O'Reilly, NAPA) accept used filters for free recycling, even if you didn't buy the replacement from them. Some locations ask you to drain the filter first into a pan; others accept it as-is. Call ahead to confirm their policy.

If you're changing the oil yourself, you'll also have used oil to dispose of. Many of the same retailers accept used oil for free. Some municipalities have hazardous waste collection days where you can drop off oil and filters at no charge. Never pour used oil down a drain or into the ground — it contaminates groundwater and is illegal in most places.

Frequently Asked Questions

Can I use a different filter if the Tungsten filter is out of stock?

Yes, as long as the part number matches the thread size and the filter is rated for your oil type. Verify the thread size (usually printed on the filter box) before you buy. If you're unsure, call the parts counter and give them your VIN — they can confirm compatibility in seconds.

What happens if I over-tighten the oil filter?

Over-tightening can crack the filter canister or damage the mounting boss on the engine block, causing an oil leak that may not show up until the engine is under load. If you tighten too much, you may need to replace the mounting surface itself, which is a more expensive repair. Hand-tight plus three-quarters is the correct standard.

Do I need to replace the filter every time I change the oil?

Yes. The filter traps contaminants over time, and reusing an old filter defeats the purpose of an oil change. A new filter is inexpensive compared to engine damage from dirty oil, so replace it every service interval.

Is synthetic oil better with the Tungsten filter?

The Tungsten filter works with both conventional and synthetic oil. Synthetic oil lasts longer and allows you to extend the interval to 10,000 miles, which means the filter also lasts longer between changes. The filter itself doesn't change — only your service schedule does.

Where can I buy the Mopar Tungsten filter for my 2025 RAM 1500?

RAM dealerships stock the OEM filter (68157391AA) and can order it if it's not in stock. Online retailers like Amazon, RockAuto, and eBay also carry it, often at a lower price than dealerships. Auto parts stores like AutoZone and NAPA can order it if they don't have it on the shelf.